Five years after jilting his pregnant fiancée on their wedding day, out-of-shape Dennis decides to run a marathon to win her back.
Ameet Chana , Chris Wilson , David Cann , David Walliams , Dylan Moran , Floella Benjamin , Hank Azaria , Harish Patel , Hazel Douglas , Iddo Goldberg , Margaret John , Nevan Finegan , Pandora Colin , Peter Serafinowicz , Robert Stone , Ruth Sheen , Shane Nolan , Sid Karne , Simon Day , Simon Lenagan , Simon Pegg , Stephen Merchant , Thandie Newton , TR Bowen
