Jean was one of the writers and producers who worked on "The Simpsons Movie", a feature-length film released in 2007. The show's voice cast was signed on to do the film in 2001, and work then began on the script. The "Simpsons" producers were initially worried that creating a film would have a negative effect on the show, as they did not have enough crew to focus their attention on both projects. As the show progressed, additional writers and animators were hired so that both the show and the film could be produced at the same time. Groening and Brooks were therefore able to invite Jean (who continued to work as show runner on the television show) to produce the film with them.