diff --git a/app/assets/javascripts/batch_comments/components/preview_item.vue b/app/assets/javascripts/batch_comments/components/preview_item.vue
index 756bcfdb3d047e9aa2a0caa3475577b651f3e293..753608cf6f763889736ccf59a500584f2474d70e 100644
--- a/app/assets/javascripts/batch_comments/components/preview_item.vue
+++ b/app/assets/javascripts/batch_comments/components/preview_item.vue
@@ -41,13 +41,17 @@ export default {
     titleText() {
       const file = this.discussion ? this.discussion.diff_file : this.draft;
 
-      if (file) {
+      if (file?.file_path) {
         return file.file_path;
       }
 
-      return sprintf(__("%{authorsName}'s thread"), {
-        authorsName: this.discussion.notes.find((note) => !note.system).author.name,
-      });
+      if (this.discussion) {
+        return sprintf(__("%{authorsName}'s thread"), {
+          authorsName: this.discussion.notes.find((note) => !note.system).author.name,
+        });
+      }
+
+      return __('Your new comment');
     },
     linePosition() {
       if (this.position?.position_type === IMAGE_DIFF_POSITION_TYPE) {
@@ -94,7 +98,7 @@ export default {
     <span class="review-preview-item-header">
       <gl-icon class="flex-shrink-0" :name="iconName" />
       <span class="bold text-nowrap gl-align-items-center">
-        <span class="review-preview-item-header-text block-truncated">
+        <span class="review-preview-item-header-text block-truncated gl-ml-2">
           {{ titleText }}
         </span>
         <template v-if="showLinePosition">
diff --git a/app/assets/javascripts/notes/components/comment_form.vue b/app/assets/javascripts/notes/components/comment_form.vue
index a47501801b44fcbbd8da282f0ac003621030b2d5..79d8ce7832903ff1985653425c665f4c2c42d547 100644
--- a/app/assets/javascripts/notes/components/comment_form.vue
+++ b/app/assets/javascripts/notes/components/comment_form.vue
@@ -84,6 +84,7 @@ export default {
       'getNoteableDataByProp',
       'getNotesData',
       'openState',
+      'hasDrafts',
     ]),
     ...mapState(['isToggleStateButtonLoading']),
     isNoteTypeComment() {
@@ -171,6 +172,9 @@ export default {
     endpoint() {
       return this.getNoteableData.create_note_path;
     },
+    draftEndpoint() {
+      return this.getNotesData.draftsPath;
+    },
     issuableTypeTitle() {
       return this.noteableType === constants.MERGE_REQUEST_NOTEABLE_TYPE
         ? this.$options.i18n.mergeRequest
@@ -214,12 +218,15 @@ export default {
         this.errors = [this.$options.i18n.GENERIC_UNSUBMITTABLE_NETWORK];
       }
     },
-    handleSave(withIssueAction) {
+    handleSaveDraft() {
+      this.handleSave({ isDraft: true });
+    },
+    handleSave({ withIssueAction = false, isDraft = false } = {}) {
       this.errors = [];
 
       if (this.note.length) {
         const noteData = {
-          endpoint: this.endpoint,
+          endpoint: isDraft ? this.draftEndpoint : this.endpoint,
           data: {
             note: {
               noteable_type: this.noteableType,
@@ -229,6 +236,7 @@ export default {
             },
             merge_request_diff_head_sha: this.getNoteableData.diff_head_sha,
           },
+          isDraft,
         };
 
         if (this.noteType === constants.DISCUSSION) {
@@ -392,62 +400,82 @@ export default {
               </markdown-field>
             </comment-field-layout>
             <div class="note-form-actions">
-              <gl-form-checkbox
-                v-if="confidentialNotesEnabled && canSetConfidential"
-                v-model="noteIsConfidential"
-                class="gl-mb-6"
-                data-testid="confidential-note-checkbox"
-              >
-                {{ $options.i18n.confidential }}
-                <gl-icon
-                  v-gl-tooltip:tooltipcontainer.bottom
-                  name="question"
-                  :size="16"
-                  :title="$options.i18n.confidentialVisibility"
-                  class="gl-text-gray-500"
-                />
-              </gl-form-checkbox>
-              <gl-dropdown
-                split
-                :text="commentButtonTitle"
-                class="gl-mr-3 js-comment-button js-comment-submit-button comment-type-dropdown"
-                category="primary"
-                variant="confirm"
-                :disabled="disableSubmitButton"
-                data-testid="comment-button"
-                data-qa-selector="comment_button"
-                :data-track-label="trackingLabel"
-                data-track-event="click_button"
-                @click="handleSave()"
-              >
-                <gl-dropdown-item
-                  is-check-item
-                  :is-checked="isNoteTypeComment"
-                  :selected="isNoteTypeComment"
-                  @click="setNoteTypeToComment"
+              <template v-if="hasDrafts">
+                <gl-button
+                  :disabled="disableSubmitButton"
+                  data-testid="add-to-review-button"
+                  type="submit"
+                  category="primary"
+                  variant="success"
+                  @click.prevent="handleSaveDraft()"
+                  >{{ __('Add to review') }}</gl-button
+                >
+                <gl-button
+                  :disabled="disableSubmitButton"
+                  data-testid="add-comment-now-button"
+                  category="secondary"
+                  @click.prevent="handleSave()"
+                  >{{ __('Add comment now') }}</gl-button
+                >
+              </template>
+              <template v-else>
+                <gl-form-checkbox
+                  v-if="confidentialNotesEnabled && canSetConfidential"
+                  v-model="noteIsConfidential"
+                  class="gl-mb-6"
+                  data-testid="confidential-note-checkbox"
                 >
-                  <strong>{{ $options.i18n.submitButton.comment }}</strong>
-                  <p class="gl-m-0">{{ commentDescription }}</p>
-                </gl-dropdown-item>
-                <gl-dropdown-divider />
-                <gl-dropdown-item
-                  is-check-item
-                  :is-checked="isNoteTypeDiscussion"
-                  :selected="isNoteTypeDiscussion"
-                  data-qa-selector="discussion_menu_item"
-                  @click="setNoteTypeToDiscussion"
+                  {{ $options.i18n.confidential }}
+                  <gl-icon
+                    v-gl-tooltip:tooltipcontainer.bottom
+                    name="question"
+                    :size="16"
+                    :title="$options.i18n.confidentialVisibility"
+                    class="gl-text-gray-500"
+                  />
+                </gl-form-checkbox>
+                <gl-dropdown
+                  split
+                  :text="commentButtonTitle"
+                  class="gl-mr-3 js-comment-button js-comment-submit-button comment-type-dropdown"
+                  category="primary"
+                  variant="confirm"
+                  :disabled="disableSubmitButton"
+                  data-testid="comment-button"
+                  data-qa-selector="comment_button"
+                  :data-track-label="trackingLabel"
+                  data-track-event="click_button"
+                  @click="handleSave()"
                 >
-                  <strong>{{ $options.i18n.submitButton.startThread }}</strong>
-                  <p class="gl-m-0">{{ startDiscussionDescription }}</p>
-                </gl-dropdown-item>
-              </gl-dropdown>
+                  <gl-dropdown-item
+                    is-check-item
+                    :is-checked="isNoteTypeComment"
+                    :selected="isNoteTypeComment"
+                    @click="setNoteTypeToComment"
+                  >
+                    <strong>{{ $options.i18n.submitButton.comment }}</strong>
+                    <p class="gl-m-0">{{ commentDescription }}</p>
+                  </gl-dropdown-item>
+                  <gl-dropdown-divider />
+                  <gl-dropdown-item
+                    is-check-item
+                    :is-checked="isNoteTypeDiscussion"
+                    :selected="isNoteTypeDiscussion"
+                    data-qa-selector="discussion_menu_item"
+                    @click="setNoteTypeToDiscussion"
+                  >
+                    <strong>{{ $options.i18n.submitButton.startThread }}</strong>
+                    <p class="gl-m-0">{{ startDiscussionDescription }}</p>
+                  </gl-dropdown-item>
+                </gl-dropdown>
+              </template>
               <gl-button
                 v-if="canToggleIssueState"
                 :loading="isToggleStateButtonLoading"
                 :class="[actionButtonClassNames, 'btn-comment btn-comment-and-close']"
                 :disabled="isSubmitting"
                 data-testid="close-reopen-button"
-                @click="handleSave(true)"
+                @click="handleSave({ withIssueAction: true })"
                 >{{ issueActionButtonTitle }}</gl-button
               >
             </div>
diff --git a/app/assets/javascripts/notes/components/notes_app.vue b/app/assets/javascripts/notes/components/notes_app.vue
index 58cfd15065992250d1948fe9dded7a5e17dfc9f0..433f75a752db8505af3964d3c24a96ab07fa1c4f 100644
--- a/app/assets/javascripts/notes/components/notes_app.vue
+++ b/app/assets/javascripts/notes/components/notes_app.vue
@@ -3,8 +3,10 @@ import { mapGetters, mapActions } from 'vuex';
 import highlightCurrentUser from '~/behaviors/markdown/highlight_current_user';
 import { __ } from '~/locale';
 import initUserPopovers from '~/user_popovers';
+import TimelineEntryItem from '~/vue_shared/components/notes/timeline_entry_item.vue';
 import OrderedLayout from '~/vue_shared/components/ordered_layout.vue';
 import glFeatureFlagsMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
+import draftNote from '../../batch_comments/components/draft_note.vue';
 import { deprecatedCreateFlash as Flash } from '../../flash';
 import { getLocationHash, doesHashExistInUrl } from '../../lib/utils/url_utility';
 import placeholderNote from '../../vue_shared/components/notes/placeholder_note.vue';
@@ -32,6 +34,8 @@ export default {
     discussionFilterNote,
     OrderedLayout,
     SidebarSubscription,
+    draftNote,
+    TimelineEntryItem,
   },
   mixins: [glFeatureFlagsMixin()],
   props: {
@@ -276,6 +280,9 @@ export default {
         <ul id="notes-list" class="notes main-notes-list timeline">
           <template v-for="discussion in allDiscussions">
             <skeleton-loading-container v-if="discussion.isSkeletonNote" :key="discussion.id" />
+            <timeline-entry-item v-else-if="discussion.isDraft" :key="discussion.id">
+              <draft-note :draft="discussion" />
+            </timeline-entry-item>
             <template v-else-if="discussion.isPlaceholderNote">
               <placeholder-system-note
                 v-if="discussion.placeholderType === $options.systemNote"
diff --git a/app/assets/javascripts/notes/stores/getters.js b/app/assets/javascripts/notes/stores/getters.js
index 43d99937b8d26ddc3e40c1b94c38697098c2df70..8d2d9d1d9f6d551d97c01db3eac9414dc1f5a750 100644
--- a/app/assets/javascripts/notes/stores/getters.js
+++ b/app/assets/javascripts/notes/stores/getters.js
@@ -2,7 +2,23 @@ import { flattenDeep, clone } from 'lodash';
 import * as constants from '../constants';
 import { collapseSystemNotes } from './collapse_utils';
 
-export const discussions = (state) => {
+const getDraftComments = (state) => {
+  if (!state.batchComments) {
+    return [];
+  }
+
+  return state.batchComments.drafts
+    .filter((draft) => !draft.line_code && !draft.discussion_id)
+    .map((x) => ({
+      ...x,
+      // Treat a top-level draft note as individual_note so it's not included in
+      // expand/collapse threads
+      individual_note: true,
+    }))
+    .sort((a, b) => a.id - b.id);
+};
+
+export const discussions = (state, getters, rootState) => {
   let discussionsInState = clone(state.discussions);
   // NOTE: not testing bc will be removed when backend is finished.
 
@@ -22,11 +38,15 @@ export const discussions = (state) => {
       .sort((a, b) => new Date(a.created_at) - new Date(b.created_at));
   }
 
+  discussionsInState = collapseSystemNotes(discussionsInState);
+
+  discussionsInState = discussionsInState.concat(getDraftComments(rootState));
+
   if (state.discussionSortOrder === constants.DESC) {
     discussionsInState = discussionsInState.reverse();
   }
 
-  return collapseSystemNotes(discussionsInState);
+  return discussionsInState;
 };
 
 export const convertedDisscussionIds = (state) => state.convertedDisscussionIds;
@@ -257,3 +277,6 @@ export const commentsDisabled = (state) => state.commentsDisabled;
 
 export const suggestionsCount = (state, getters) =>
   Object.values(getters.notesById).filter((n) => n.suggestions.length).length;
+
+export const hasDrafts = (state, getters, rootState, rootGetters) =>
+  Boolean(rootGetters['batchComments/hasDrafts']);
diff --git a/changelogs/unreleased/8225-allow-add-discussion-to-review.yml b/changelogs/unreleased/8225-allow-add-discussion-to-review.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b9806cf693f29907c6dda696ce04486911b6238c
--- /dev/null
+++ b/changelogs/unreleased/8225-allow-add-discussion-to-review.yml
@@ -0,0 +1,5 @@
+---
+title: Allow Add Comment To Review
+merge_request: 51718
+author: Lee Tickett @leetickett
+type: added
diff --git a/doc/user/discussions/img/mr_review_new_comment_v13_11.png b/doc/user/discussions/img/mr_review_new_comment_v13_11.png
new file mode 100644
index 0000000000000000000000000000000000000000..6b4899bf67ff3f46c90a8cb81ade82e6af9539bb
Binary files /dev/null and b/doc/user/discussions/img/mr_review_new_comment_v13_11.png differ
diff --git a/doc/user/discussions/img/review_preview.png b/doc/user/discussions/img/review_preview.png
deleted file mode 100644
index e69a58dbb912cb7c2d2708412abf6f0bf55c8275..0000000000000000000000000000000000000000
Binary files a/doc/user/discussions/img/review_preview.png and /dev/null differ
diff --git a/doc/user/discussions/img/review_preview_v13_11.png b/doc/user/discussions/img/review_preview_v13_11.png
new file mode 100644
index 0000000000000000000000000000000000000000..79e33aa0991edd3e7ab9db4629adba1e897276bc
Binary files /dev/null and b/doc/user/discussions/img/review_preview_v13_11.png differ
diff --git a/doc/user/discussions/index.md b/doc/user/discussions/index.md
index f622d075ba4292fc485b3a5d8c88e97a17d7ff14..aa49f9468bebc54d9bd8676c1e4704fdc4408633 100644
--- a/doc/user/discussions/index.md
+++ b/doc/user/discussions/index.md
@@ -334,22 +334,28 @@ comment itself.
 
 ![Unresolve status](img/mr_review_unresolve.png)
 
+### Adding a new comment
+
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/8225) in GitLab 13.10.
+
+If you have a review in progress, you will be presented with the option to **Add to review**:
+
+![New thread](img/mr_review_new_comment_v13_11.png)
+
 ### Submitting a review
 
 If you have any comments that have not been submitted, a bar displays at the
 bottom of the screen with two buttons:
 
-- **Discard**: Discards all comments that have not been submitted.
-- **Finish review**: Opens a list of comments ready to be submitted for review.
-  Clicking **Submit review** publishes all comments. Any quick actions
-  submitted are performed at this time.
+- **Pending comments**: Opens a list of comments ready to be submitted for review.
+- **Submit review**: Publishes all comments. Any quick actions submitted are performed at this time.
 
 Alternatively, to finish the entire review from a pending comment:
 
-- Click the **Finish review** button on the comment.
+- Click the **Submit review** button on the comment.
 - Use the `/submit_review` [quick action](../project/quick_actions.md) in the text of non-review comment.
 
-![Review submission](img/review_preview.png)
+![Review submission](img/review_preview_v13_11.png)
 
 Submitting the review sends a single email to every notifiable user of the
 merge request with all the comments associated to it.
diff --git a/ee/app/assets/stylesheets/components/batch_comments/draft_note.scss b/ee/app/assets/stylesheets/components/batch_comments/draft_note.scss
index 1dce0a355d365d7bcb9fc36f9ac131d2d2ced5b1..9083ce0668dc5c9552fef71927c8ee91df958f20 100644
--- a/ee/app/assets/stylesheets/components/batch_comments/draft_note.scss
+++ b/ee/app/assets/stylesheets/components/batch_comments/draft_note.scss
@@ -40,20 +40,18 @@ button[disabled] {
   vertical-align: text-top;
 }
 
-.discussion-body,
-.diff-file {
-  .notes .note {
-    &.draft-note {
-      margin: 0 0 $gl-padding;
-      padding: 0;
-      border: 0;
+.note.draft-note {
+  margin: 0 0 $gl-padding;
+  padding: 0;
+  border: 0;
 
-      &.is-editing {
-        margin-bottom: 0;
-      }
-    }
+  &.is-editing {
+    margin-bottom: 0;
   }
+}
 
+.discussion-body,
+.diff-file {
   .notes_holder {
     .notes-content {
       .notes {
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index 326955837f7efeee4cbbac4c07e4ed3c0ee68877..7f9dfbc597099175daf9b0553dcfd9e1fa2ea9fe 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -35998,6 +35998,9 @@ msgstr ""
 msgid "Your new SCIM token"
 msgstr ""
 
+msgid "Your new comment"
+msgstr ""
+
 msgid "Your new personal access token has been created."
 msgstr ""
 
diff --git a/spec/features/merge_request/batch_comments_spec.rb b/spec/features/merge_request/batch_comments_spec.rb
index 25f2707146df65bd37e60d124eb2fe28daeadeef..d3e32ecff283a115cc9eed23c86633896c5e862a 100644
--- a/spec/features/merge_request/batch_comments_spec.rb
+++ b/spec/features/merge_request/batch_comments_spec.rb
@@ -28,7 +28,7 @@
     end
 
     it 'adds draft note' do
-      write_comment
+      write_diff_comment
 
       expect(find('.draft-note-component')).to have_content('Line is wrong')
 
@@ -38,7 +38,7 @@
     end
 
     it 'publishes review' do
-      write_comment
+      write_diff_comment
 
       page.within('.review-bar-content') do
         click_button 'Submit review'
@@ -52,7 +52,7 @@
     end
 
     it 'publishes single comment' do
-      write_comment
+      write_diff_comment
 
       click_button 'Add comment now'
 
@@ -64,7 +64,7 @@
     end
 
     it 'deletes draft note' do
-      write_comment
+      write_diff_comment
 
       accept_alert { find('.js-note-delete').click }
 
@@ -74,21 +74,57 @@
     end
 
     it 'edits draft note' do
-      write_comment
+      write_diff_comment
 
       find('.js-note-edit').click
 
       # make sure comment form is in view
       execute_script("window.scrollBy(0, 200)")
 
-      page.within('.js-discussion-note-form') do
-        fill_in('note_note', with: 'Testing update')
-        click_button('Save comment')
+      write_comment(text: 'Testing update', button_text: 'Save comment')
+
+      expect(page).to have_selector('.draft-note-component', text: 'Testing update')
+    end
+
+    context 'adding single comment to review' do
+      before do
+        visit_overview
       end
 
-      wait_for_requests
+      it 'at first does not show `Add to review` and `Add comment now` buttons' do
+        expect(page).to have_no_button('Add to review')
+        expect(page).to have_no_button('Add comment now')
+      end
 
-      expect(page).to have_selector('.draft-note-component', text: 'Testing update')
+      context 'when review has started' do
+        before do
+          visit_diffs
+
+          write_diff_comment
+
+          visit_overview
+        end
+
+        it 'can add comment to review' do
+          write_comment(selector: '.js-main-target-form', field: 'note-body', text: 'Its a draft comment', button_text: 'Add to review')
+
+          expect(page).to have_selector('.draft-note-component', text: 'Its a draft comment')
+
+          click_button('Pending comments')
+
+          expect(page).to have_text('2 pending comments')
+        end
+
+        it 'can add comment right away' do
+          write_comment(selector: '.js-main-target-form', field: 'note-body', text: 'Its a regular comment', button_text: 'Add comment now')
+
+          expect(page).to have_selector('.note:not(.draft-note)', text: 'Its a regular comment')
+
+          click_button('Pending comments')
+
+          expect(page).to have_text('1 pending comment')
+        end
+      end
     end
 
     context 'in parallel diff' do
@@ -197,46 +233,51 @@ def visit_diffs
     wait_for_requests
   end
 
-  def write_comment(button_text: 'Start a review', text: 'Line is wrong')
-    click_diff_line(find("[id='#{sample_compare.changes[0][:line_code]}']"))
-
-    page.within('.js-discussion-note-form') do
-      fill_in('note_note', with: text)
-      click_button(button_text)
-    end
+  def visit_overview
+    visit project_merge_request_path(merge_request.project, merge_request)
 
     wait_for_requests
   end
 
-  def write_parallel_comment(line, button_text: 'Start a review', text: 'Line is wrong')
+  def write_diff_comment(**params)
+    click_diff_line(find("[id='#{sample_compare.changes[0][:line_code]}']"))
+
+    write_comment(**params)
+  end
+
+  def write_parallel_comment(line, **params)
     find("td[id='#{line}']").hover
     find(".is-over button").click
 
-    page.within("form[data-line-code='#{line}']") do
-      fill_in('note_note', with: text)
+    write_comment(selector: "form[data-line-code='#{line}']", **params)
+  end
+
+  def write_comment(selector: '.js-discussion-note-form', field: 'note_note', button_text: 'Start a review', text: 'Line is wrong')
+    page.within(selector) do
+      fill_in(field, with: text)
       click_button(button_text)
     end
 
     wait_for_requests
   end
-end
 
-def write_reply_to_discussion(button_text: 'Start a review', text: 'Line is wrong', resolve: false, unresolve: false)
-  page.within(first('.diff-files-holder .discussion-reply-holder')) do
-    find_field('Reply…', match: :first).click
+  def write_reply_to_discussion(button_text: 'Start a review', text: 'Line is wrong', resolve: false, unresolve: false)
+    page.within(first('.diff-files-holder .discussion-reply-holder')) do
+      find_field('Reply…', match: :first).click
 
-    fill_in('note_note', with: text)
+      fill_in('note_note', with: text)
 
-    if resolve
-      page.check('Resolve thread')
-    end
+      if resolve
+        page.check('Resolve thread')
+      end
 
-    if unresolve
-      page.check('Unresolve thread')
+      if unresolve
+        page.check('Unresolve thread')
+      end
+
+      click_button(button_text)
     end
 
-    click_button(button_text)
+    wait_for_requests
   end
-
-  wait_for_requests
 end
diff --git a/spec/frontend/batch_comments/components/preview_item_spec.js b/spec/frontend/batch_comments/components/preview_item_spec.js
index 08167a940682f74f3028ccb58fcf96eb2890caf2..03a28ce8001b19571ba1a89c4fbfb2868fe46a81 100644
--- a/spec/frontend/batch_comments/components/preview_item_spec.js
+++ b/spec/frontend/batch_comments/components/preview_item_spec.js
@@ -124,4 +124,16 @@ describe('Batch comments draft preview item component', () => {
       );
     });
   });
+
+  describe('for new comment', () => {
+    it('renders title', () => {
+      createComponent(false, {}, (store) => {
+        store.state.notes.discussions.push({});
+      });
+
+      expect(vm.$el.querySelector('.review-preview-item-header-text').textContent).toContain(
+        'Your new comment',
+      );
+    });
+  });
 });
diff --git a/spec/frontend/notes/components/comment_form_spec.js b/spec/frontend/notes/components/comment_form_spec.js
index bab90723578363483e4cd5eb752114d6e2ce00ba..b717bab7c3f825b2ca8f1c54b06ce7886a7ce4df 100644
--- a/spec/frontend/notes/components/comment_form_spec.js
+++ b/spec/frontend/notes/components/comment_form_spec.js
@@ -1,10 +1,11 @@
-import { GlDropdown, GlAlert } from '@gitlab/ui';
+import { GlAlert } from '@gitlab/ui';
 import { mount, shallowMount } from '@vue/test-utils';
 import Autosize from 'autosize';
 import MockAdapter from 'axios-mock-adapter';
 import Vue, { nextTick } from 'vue';
 import Vuex from 'vuex';
 import { extendedWrapper } from 'helpers/vue_test_utils_helper';
+import batchComments from '~/batch_comments/stores/modules/batch_comments';
 import { refreshUserMergeRequestCounts } from '~/commons/nav/user_merge_requests';
 import { deprecatedCreateFlash as flash } from '~/flash';
 import axios from '~/lib/utils/axios_utils';
@@ -29,8 +30,10 @@ describe('issue_comment_form component', () => {
 
   const findCloseReopenButton = () => wrapper.findByTestId('close-reopen-button');
   const findTextArea = () => wrapper.findByTestId('comment-field');
+  const findAddToReviewButton = () => wrapper.findByTestId('add-to-review-button');
+  const findAddCommentNowButton = () => wrapper.findByTestId('add-comment-now-button');
   const findConfidentialNoteCheckbox = () => wrapper.findByTestId('confidential-note-checkbox');
-  const findCommentGlDropdown = () => wrapper.find(GlDropdown);
+  const findCommentGlDropdown = () => wrapper.findByTestId('comment-button');
   const findCommentButton = () => findCommentGlDropdown().find('button');
   const findErrorAlerts = () => wrapper.findAllComponents(GlAlert).wrappers;
 
@@ -582,4 +585,64 @@ describe('issue_comment_form component', () => {
       expect(findTextArea().exists()).toBe(false);
     });
   });
+
+  describe('with batchComments in store', () => {
+    beforeEach(() => {
+      store.registerModule('batchComments', batchComments());
+    });
+
+    describe('add to review and comment now buttons', () => {
+      it('when no drafts exist, should not render', () => {
+        mountComponent();
+
+        expect(findCommentGlDropdown().exists()).toBe(true);
+        expect(findAddToReviewButton().exists()).toBe(false);
+        expect(findAddCommentNowButton().exists()).toBe(false);
+      });
+
+      describe('when drafts exist', () => {
+        beforeEach(() => {
+          store.state.batchComments.drafts = [{ note: 'A' }];
+        });
+
+        it('should render', () => {
+          mountComponent();
+
+          expect(findCommentGlDropdown().exists()).toBe(false);
+          expect(findAddToReviewButton().exists()).toBe(true);
+          expect(findAddCommentNowButton().exists()).toBe(true);
+        });
+
+        it('clicking `add to review`, should call draft endpoint, set `isDraft` true', () => {
+          mountComponent({ mountFunction: mount, initialData: { note: 'a draft note' } });
+
+          jest.spyOn(store, 'dispatch').mockResolvedValue();
+          findAddToReviewButton().trigger('click');
+
+          expect(store.dispatch).toHaveBeenCalledWith(
+            'saveNote',
+            expect.objectContaining({
+              endpoint: notesDataMock.draftsPath,
+              isDraft: true,
+            }),
+          );
+        });
+
+        it('clicking `add comment now`, should call note endpoint, set `isDraft` false ', () => {
+          mountComponent({ mountFunction: mount, initialData: { note: 'a comment' } });
+
+          jest.spyOn(store, 'dispatch').mockResolvedValue();
+          findAddCommentNowButton().trigger('click');
+
+          expect(store.dispatch).toHaveBeenCalledWith(
+            'saveNote',
+            expect.objectContaining({
+              endpoint: noteableDataMock.create_note_path,
+              isDraft: false,
+            }),
+          );
+        });
+      });
+    });
+  });
 });
diff --git a/spec/frontend/notes/components/notes_app_spec.js b/spec/frontend/notes/components/notes_app_spec.js
index 163501d5ce801db90d4a82cffaa8c68d25689a72..727e24b6bd908d7d7c9a145cea3fcaf223319151 100644
--- a/spec/frontend/notes/components/notes_app_spec.js
+++ b/spec/frontend/notes/components/notes_app_spec.js
@@ -3,6 +3,8 @@ import AxiosMockAdapter from 'axios-mock-adapter';
 import $ from 'jquery';
 import Vue from 'vue';
 import { setTestTimeout } from 'helpers/timeout';
+import DraftNote from '~/batch_comments/components/draft_note.vue';
+import batchComments from '~/batch_comments/stores/modules/batch_comments';
 import axios from '~/lib/utils/axios_utils';
 import * as urlUtility from '~/lib/utils/url_utility';
 import CommentForm from '~/notes/components/comment_form.vue';
@@ -400,4 +402,34 @@ describe('note_app', () => {
       expect(getComponentOrder()).toStrictEqual([TYPE_NOTES_LIST, TYPE_COMMENT_FORM]);
     });
   });
+
+  describe('when multiple draft types are present', () => {
+    beforeEach(() => {
+      store = createStore();
+      store.registerModule('batchComments', batchComments());
+      store.state.batchComments.drafts = [
+        { line_code: 1, isDraft: true },
+        { discussion_id: 1, isDraft: true },
+        { note: 'A', isDraft: true },
+        { note: 'B', isDraft: true },
+      ];
+      store.state.isLoading = false;
+      wrapper = shallowMount(NotesApp, {
+        propsData,
+        store,
+        stubs: {
+          OrderedLayout,
+        },
+      });
+    });
+
+    it('correctly finds only draft comments', () => {
+      const drafts = wrapper.findAll(DraftNote).wrappers;
+
+      expect(drafts.map((x) => x.props('draft'))).toEqual([
+        expect.objectContaining({ note: 'A' }),
+        expect.objectContaining({ note: 'B' }),
+      ]);
+    });
+  });
 });
diff --git a/spec/frontend/notes/mock_data.js b/spec/frontend/notes/mock_data.js
index 638a4edecd617bca0a498b2df1549971fad9fe34..44bb87d77362fad285594f97e89b5a12d8dfc91b 100644
--- a/spec/frontend/notes/mock_data.js
+++ b/spec/frontend/notes/mock_data.js
@@ -6,6 +6,7 @@ export const notesDataMock = {
   markdownDocsPath: '/help/user/markdown',
   newSessionPath: '/users/sign_in?redirect_to_referer=yes',
   notesPath: '/gitlab-org/gitlab-foss/noteable/issue/98/notes',
+  draftsPath: '/flightjs/flight/-/merge_requests/4/drafts',
   quickActionsDocsPath: '/help/user/project/quick_actions',
   registerPath: '/users/sign_up?redirect_to_referer=yes',
   prerenderedNotesCount: 1,
@@ -1270,3 +1271,12 @@ export const batchSuggestionsInfoMock = [
     discussionId: 'c003',
   },
 ];
+
+export const draftComments = [
+  { id: 7, note: 'test draft note' },
+  { id: 9, note: 'draft note 2' },
+];
+
+export const draftReply = { id: 8, note: 'draft reply', discussion_id: 1 };
+
+export const draftDiffDiscussion = { id: 6, note: 'draft diff discussion', line_code: 1 };
diff --git a/spec/frontend/notes/stores/getters_spec.js b/spec/frontend/notes/stores/getters_spec.js
index 4d2f86a1ecfff036dadcc657e5d89f0ccf4b51bd..3adb5da020e2950ab9801c94aaa085b1ca87f4a0 100644
--- a/spec/frontend/notes/stores/getters_spec.js
+++ b/spec/frontend/notes/stores/getters_spec.js
@@ -1,4 +1,4 @@
-import { DESC } from '~/notes/constants';
+import { DESC, ASC } from '~/notes/constants';
 import * as getters from '~/notes/stores/getters';
 import {
   notesDataMock,
@@ -12,6 +12,9 @@ import {
   discussion3,
   resolvedDiscussion1,
   unresolvableDiscussion,
+  draftComments,
+  draftReply,
+  draftDiffDiscussion,
 } from '../mock_data';
 
 const discussionWithTwoUnresolvedNotes = 'merge_requests/resolved_diff_discussion.json';
@@ -23,6 +26,8 @@ const createDiscussionNeighborParams = (discussionId, diffOrder, step) => ({
   step,
 });
 
+const asDraftDiscussion = (x) => ({ ...x, individual_note: true });
+
 describe('Getters Notes Store', () => {
   let state;
 
@@ -61,20 +66,58 @@ describe('Getters Notes Store', () => {
   });
 
   describe('discussions', () => {
-    it('should return all discussions in the store', () => {
-      expect(getters.discussions(state)).toEqual([individualNote]);
-    });
+    let batchComments = null;
+
+    const getDiscussions = () => getters.discussions(state, {}, { batchComments });
+
+    describe('without batchComments module', () => {
+      it('should return all discussions in the store', () => {
+        expect(getDiscussions()).toEqual([individualNote]);
+      });
+
+      it('should transform  discussion to individual notes in timeline view', () => {
+        state.discussions = [discussionMock];
+        state.isTimelineEnabled = true;
 
-    it('should transform  discussion to individual notes in timeline view', () => {
-      state.discussions = [discussionMock];
-      state.isTimelineEnabled = true;
+        const discussions = getDiscussions();
+
+        expect(discussions.length).toEqual(discussionMock.notes.length);
+        discussions.forEach((discussion) => {
+          expect(discussion.individual_note).toBe(true);
+          expect(discussion.id).toBe(discussion.notes[0].id);
+          expect(discussion.created_at).toBe(discussion.notes[0].created_at);
+        });
+      });
+    });
 
-      expect(getters.discussions(state).length).toEqual(discussionMock.notes.length);
-      getters.discussions(state).forEach((discussion) => {
-        expect(discussion.individual_note).toBe(true);
-        expect(discussion.id).toBe(discussion.notes[0].id);
-        expect(discussion.created_at).toBe(discussion.notes[0].created_at);
+    describe('with batchComments', () => {
+      beforeEach(() => {
+        batchComments = { drafts: [...draftComments, draftReply, draftDiffDiscussion] };
       });
+
+      it.each`
+        discussionSortOrder | expectation
+        ${ASC}              | ${[individualNote, ...draftComments.map(asDraftDiscussion)]}
+        ${DESC}             | ${[...draftComments.reverse().map(asDraftDiscussion), individualNote]}
+      `(
+        'only appends draft comments (discussionSortOrder=$discussionSortOrder)',
+        ({ discussionSortOrder, expectation }) => {
+          state.discussionSortOrder = discussionSortOrder;
+
+          expect(getDiscussions()).toEqual(expectation);
+        },
+      );
+    });
+  });
+
+  describe('hasDrafts', () => {
+    it.each`
+      rootGetters                             | expected
+      ${{}}                                   | ${false}
+      ${{ 'batchComments/hasDrafts': true }}  | ${true}
+      ${{ 'batchComments/hasDrafts': false }} | ${false}
+    `('with rootGetters=$rootGetters, returns $expected', ({ rootGetters, expected }) => {
+      expect(getters.hasDrafts({}, {}, {}, rootGetters)).toBe(expected);
     });
   });
 
@@ -103,7 +146,7 @@ describe('Getters Notes Store', () => {
     };
 
     it('should return a single system note when a description was updated multiple times', () => {
-      expect(getters.discussions(stateCollapsedNotes).length).toEqual(1);
+      expect(getters.discussions(stateCollapsedNotes, {}, {}).length).toEqual(1);
     });
   });