Also Known As:- Cours toujours Dennis
- Run, Fatboy, Run
- Corre, gordo, corre
- Corredor de fondón
- Fuss, dagi, fuss!
- Gazu mieczaku, gazu
- Maratona do Amor
- Run, Fat Boy, Run
- Trexe agapi mou
- David Schwimmer
- Michael Ian Black
- Simon Pegg
- Michael Ian Black
- Simon Pegg ... Dennis
- Thandie 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
- Tyrone Huggins ... Grover
- Nevan Finegan ... Mickey
- Iddo Goldberg ... News Reporter
- Ameet Chana ... Taxi Driver
- Chris Hollins ... Himself
- Denise 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 1
- T.R. Bowen ... Doctor (as Trevor Bowen)
- Margaret John ... Libby's Grandmother
- Floella Benjamin ... Libby's Mum
- David Milne ... Libby's Dad
- Henrietta Clemett ... Reception Nurse
- Peter Serafinowicz ... TV Commentator
- Sid Karne ... Marathon Runner
- Shane Nolan ... Police Officer
- Macy Nyman ... Boating Girl
- Preston Nyman ... Boating boy
- Robert Stone ... Weightlifter
- Chris Wilson ... Police Officer
.