Dennis
Simon Pegg
Libby
Thandiwe Newton
Grover
Tyrone Huggins
News Reporter
Iddo Goldberg
Taxi Driver
Ameet Chana
Himself
Chris Hollins
Herself
Denis Lewis
Nurse
Lorna Gayle
Drag Queen
Gabriel Fleary
Claire
Pandora Colin
Man with Broken Leg
Stephen Merchant
Man in Bakery
David Walliams
Whit
Hank Azaria
Older Woman
Hazel Douglas
Receptionist
Anna Tolputt
Undercover Cop / Dad
Simon Lenagan
Marathon Official
David Cann
Doctor
T.R. Bowen
Libby's Grandmother
Margaret John
Libby's Mum
Floella Benjamin
Libby's Dad
David Milner
Reception Nurse
Henrietta Clemett
TV Commentator
Peter Serafinowicz
Gordon
Dylan Moran
Boating Boy (uncredited)
Preston Nyman
Mr. Goshdashtidar
Harish Patel
Maya Goshdashtidar
India de Beaufort
Jake
Matthew Fenton
Vincent
Simon Day
Claudine
Ruth Sheen
Mickey
Nevan Finegan
Director
David Schwimmer
Screenplay
Michael Ian Black
Original Music Composer
Alex Wurman
Executive Producer
Alexa L. Fogel
Director of Photography
Richard Greatrex
Producer
Robert Jones
Sarah Curtis
Joseph Infantolino
Editor
Michael Parker
Set Costumer
Charlie Knight
Production Design
Sophie Becher
Costume Design
Annie Hardinge
Casting
Michelle Guish