Keira Knightley
Em (voice)
Michael Palin
Gariiiiiii (voice)
Ozzy Osbourne
Vicar (voice)
Gillian Anderson
Queen Vorkana (voice)
Paul Whitehouse
Prancer (voice)
Jane Horrocks
Donner (voice)
Russell Brand
Earth Guardian (voice)
Harry Enfield
Old Jingle (voice)
Graham Norton
Computer (voice)
Sean Hughes
Tapir (voice)
Ross Kemp
Trooper #2 (voice)
Ardal O'Hanlon
Robbie (voice)
Shane Richie
Trooper #1 (voice)