When building the character of Kurt Kunkle, Eugene Kotlyarenko and star Joe Keery watched cringe compilations and videos from people without a big following.
During the scene at the taco truck, a comment on Kurt's stream says "Waddup I'm Jared I'm 19 and I never f***ing learned how to read" in reference to a famous Vine by Josh Ovalle, who plays Bobby in the film.
Writer and director Eugene Kotlyarenko said he did "40 all nighters" writing all the comments and user names that appear throughout the movie.
Only Two scenes in Spree where filmed with a film camera
Despite this movie coming out in 2020, as of July 2022, Joe Keery still is posting on TikTok as Kurt under the account @kurtsworld