Domhnall Gleeson

as Harry O'Hay (voice)

as Loftus Cliffe (voice) / Roger Lamb (voice) / John MacPherson (voice) / John Bowater (voice) / William Barton (voice)

as voice

as Ned Sampson

as Jackie

as Owen Carver

as Ray

as Jack

as Boy

as John Dean

as Sam Fortner

as Doofus

as Mr. Thomas McGregor

as Billy Johnson

as Self

as General Hux

as Gabriel O'Malley

as General Hux (voice) (archive sound)

as Dr. Faraday

as Shergar

as Thomas McGregor / Mr. Jeremy Fisher (voice)

as Henry Beard

as General Hux

as Stensland

as Alan Alexander Milne / Blue

as Oldest Son

as Monty 'Schafer'

as Thomas Burberry

as Self - Narrator

as Captain Andrew Henry

as General Hux

as Jim Farrell

as Self - Guest

as Self

as Self - Guest

as Caleb

as Russel Allen 'Phil' Phillips

as Self

as Jon Burroughs

as Freddie Joyce

as Self

as Self - Guest

as Tim Lake

as Clan Techie

as Levin

as Connor

as Ash Starmer

as Donal

as Bill Weasley

as Bob Geldof

as Moon (The Kid)

as Bill Weasley

as Rodney

as Clifford

as Anthony Armstrong

as Mahon

as Self

as Trampis

as Brian (voice)

as Bernard

as Cashier

as Byrne

as Young Joe Quimby Sr. (voice)

as Daniel