Nick Frost as Little Arthur

Jason Isaacs as

Matthew Macfadyen as

Rafe Spall as

Lee Ingleby as

Mark Gatiss as Roddy McDowel

Michael Smiley as Molester

Peter Serafinowicz as

Stuart Wilson as

Will Arnett as (voice)

Katie Melua as

Lucy Punch as

Daisy Haggard as

Emily Booth as Featured Woman

Georgina Chapman as

MyAnna Buring as Featured Woman

Nicola Cunningham as

Simon Pegg as Screaming Lunatic (uncredited)