Overview
Run Fatboy Run (also written Run, Fatboy, Run) is a 2007 comedy film directed by David Schwimmer, written by Michael Ian Black and Simon Pegg, and starring Pegg, Dylan Moran, Thandiwe Newton, Harish Patel, India de Beaufort and Hank Azaria. It was released in the United Kingdom on 7 September 2007, in Canada on 10 September 2007, and in the United States on 28 March 2008.
Plot
Dennis Doyle is about to marry Libby, his pregnant fiancée. However, he gets cold feet and runs away on the day of the wedding. Five years later, Dennis discovers that Libby, who has their son, Jake, has started seeing successful but arrogant Whit and realises that he has truly lost her. He finds out that Whit is running the Nike River Marathon in London, and to prove himself to his uncertain friends and, most importantly, Libby and his son, he decides to run the race himself.
He receives motivation from his two "coaches", Gordon, a well-meaning slacker who is Libby's cousin and Dennis' best friend, who has made a hefty bet on Dennis succeeding, and Mr. Ghoshdastidar, his landlord, who uses unorthodox methods of training, such as using a spatula to spank him. Days before the race, Whit proposes to Libby at her birthday party. Libby accepts and this puts Dennis in a state of deep depression. As a result, he decides to quit the race.
Meanwhile, Jake, who has formed a crush on a girl in his class, runs away upset when he discovers that she prefers another boy just because he has a ponytail. Dennis, upon being informed by a frantic Libby, tracks him down and explains to him that he will find many things he does not like in his life and he should just stand up to them and face them, rather than running away. Having made that mistake himself, he decides to race after all.
From Wikipedia (CC BY-SA 4.0).