The main cast did two weeks of improv rehearsals before performing in front of live audiences. Footage from their performances were used in the film.
Gillian Jacobs has never done improv and was given two weeks of training on improv comedy, despite her appearances on improv podcasts like Comedy Bang Bang. In addition, Kate Micucci had not done improv for years and trained along with Jacobs for their roles.
Allison's drawings that are shown in the film, and excerpts from her graphic novel, are Kate Micucci's own artwork.
During filming of The Commune's stage performances, the Steadicam operator improvised camera shots as the cast performed.
According to Mike Birbiglia, Jimmy Carr agreed to take the role of a fake TV psychic, but the character was lost as 'it was too much of a digression'.