Tom Ellis (Lucifer) does his own singing throughout the show, although does not play the piano on screen. In early interviews for the show, he said he didn't "really know" how to. In 2019, a video of him accompanying himself on a piano whilst singing showed he's since added this skill to his repertoire (however, he has said in several interviews since that he is still only playing ¨air piano¨ in scenes as Lucifer).
In almost all episodes, the name of the episode is said by Lucifer.
The Lucifer cast and crew were told that Netflix saved the show for its fifth and final season only hours before the information was released to the public. After its success on the streaming platform, the show was extended for one more season.
At least one character says the word "hell" in every episode.
In the television series Supernatural, season 11 episode 10, the show's version of Lucifer says if he got out of his cage in Hell, he would move to Los Angeles and help solve crime. The episode aired before the Lucifer pilot.