Run, Fatboy, Run Love. Commitment. Responsibility. There's nothing he won't run away from. Five years after jilting his pregnant fiancée on their wedding day, out-of-shape Dennis decides to run a marathon to win her back. Details Casts Videos Galleries Posters Title Run, Fatboy, Run Release Date 2007-09-06 Runtime 01 Hours 40 Minutes Genres Comedy Romance Production Companies Entertainment Films, Material Entertainment, Beech Hill Films, Gold Circle Films Production Countries United Kingdom, United States of America Simon Pegg... Dennis... Thandiwe Newton... Libby... Hank Azaria... Whit... Dylan Moran... Gordon... Harish Patel... Mr. Goshdashtidar... India de Beaufort... Maya Goshdashtidar... Matthew Fenton... Jake... Simon Day... Vincent... Ruth Sheen... Claudine... Nevan Finegan... Mickey... Tyrone Huggins... Grover... Iddo Goldberg... News Reporter... Ameet Chana... Taxi Driver... Chris Hollins... Himself... Denis Lewis... Herself... Lorna Gayle... Nurse... Gabriel Fleary... Drag Queen... Pandora Colin... Claire... Stephen Merchant... Man with Broken Leg... David Walliams... Man in Bakery... Hazel Douglas... Older Woman... Anna Tolputt... Receptionist... Simon Lenagan... Undercover Cop / Dad... David Cann... Marathon Official... T.R. Bowen... Doctor... Margaret John... Libby's Grandmother... Floella Benjamin... Libby's Mum... David Milner... Libby's Dad... Henrietta Clemett... Reception Nurse... Peter Serafinowicz... TV Commentator... Run Fatboy Run - Original Theatrical Trailer (Trailer) Run Fat Boy Run - Trailer (Trailer) Original Size (3840x2160) Original Size (1920x1080) Original Size (564x797) Original Size (1400x2100) Original Size (1600x2400) Original Size (1400x2100) Original Size (1400x2100) Original Size (1000x1500) Original Size (1400x2100) Original Size (1000x1500) Original Size (749x1080) Original Size (570x800) Original Size (1400x2100) Original Size (1531x2153) Original Size (500x750) Original Size (1000x1500) Original Size (1134x1605)