In late 2005, Dean Gray released a mash-up version of the album—called American Edit—and became a cause célèbre when the artist was served with a cease and desist order by Green Day's record label. Tracks include "Dr. Who on Holiday" and "Boulevard of Broken Songs". Billie Joe Armstrong later stated that he heard one of the songs on the radio and enjoyed it.^[23]

Shortly after the album was released there was speculation that American Idiot might be made into a movie. VH1 quoted Armstrong as saying "We've definitely been talking about someone writing a script for it, and there's been a few different names that have been thrown at us. It sounds really exciting, but for right now it's just talk."^[24] Armstrong later stated that shooting would begin for American Idiot: The Motion Picture in 2006, stressing, "We want to see how it turns out first so that it doesn't suck."^[25] On June 1, 2006 Armstrong announced in an interview with MTV.com that "it's definitely unfolding" and that "every single week there's more ideas about doing a film for American Idiot, and it's definitely going to happen,"^[26] but the band later said, "It is gonna take a little while." Armstrong mentioned that this project is currently on hold to work on their music.^[27]

The American Idiot stage musical adaptation premiered at the Berkeley Repertory Theatre in September 2009. It was initially intended to run through October 11, but before the premiere, the theatre announced a three week extension. The new closing date is November 15. The musical is a collaboration between Green Day and director Michael Mayer.^[28] Green Day does not appear in the production, but the show features an onstage band.^[29] According to Susan Medak, managing director of the Berkeley Repertory, the theater was part of the producing team and had been looking for work that crosses generational lines.^[30]

The current cast features Tony award winner John Gallagher Jr. as Johnny, Michael Esper as Will, Stark Sands as Tunny, Tony Vincent as St Jimmy, Rebecca Naomi Jones as Whatsername, Mary Faber as Heather. ^[31] The show features all of the songs from the album American Idiot, some B-sides and a few songs from Green Day's next album, 21st Century Breakdown.^[32]