Big Fat Liar is the hilarious revenge comedy filled with nonstop action and laugh-out-loud fun! Fourteen-year-old Jason Shepherd (Frankie Muniz) has a reputation for stretching the truth. So, when big-time Hollywood producer Marty Wolf (Paul Giamatti) steals his class paper and turns it into a smash hit movie, no one believes Jason's latest tall tale. On a cross-country adventure to set the record straight, Jason and best friend Kaylee (Amanda Bynes) devise a high-tech plan to squeeze the truth out of Wolf through a series of outrageous pranks, crazy stunts and big laughs. It's payback time - BIG TIME!