Former co-stars of the TV sitcom
Head of the Class teamed up to write the story and script for this teen comedy. When junior high-school student Jason Shepherd (
Frankie Muniz) realizes that his class paper has been ripped off and turned into a hit motion picture called "Big Fat Liar," he takes matters into his own hands. Along with his best friend, Kaylee (
Amanda Bynes), Jason travels to Los Angeles, where he intends to confront Hollywood big shot Marty Wolf (
Paul Giamatti), the sleazy producer responsible for ripping him off. When he's unable to get Wolf to do the right thing, Jason subjects the showbiz power broker to a series of humiliating pranks and stunts designed to make an honest man out of him. Big Fat Liar co-stars
Lee Majors and
Amanda Detmer. ~ Karl Williams, All Movie Guide