Simon Pegg
Neil Clarke
Acting
Kate Beckinsale
Catherine
Acting
Robin Williams
Dennis the Dog (voice)
Acting
Rob Riggle
Grant
Acting
Sanjeev Bhaskar
Ray
Acting
Joanna Lumley
Fenella
Acting
Marianne Oldham
Rosie
Acting
Eddie Izzard
Headmaster
Acting
Robert Bathurst
James Cleverill
Acting
John Cleese
Chief Alien (voice)
Acting
Judy Loe
Canteen Lady
Acting
Brian Cox
Self
Acting
Meera Syal
Fiona
Acting
Emma Pierson
Miss Pringle
Acting
David Annen
Newsreader
Acting
Mairi McHaffie
Newsreader
Acting
Gavin Scott
Newsreader
Writing
Terry Gilliam
Nasty Alien (voice)
Directing
Eric Idle
Salubrious Gat (voice)
Acting
Terry Jones
Scientist Alien (voice) / Van Driver
Acting
Michael Palin
Kindly Alien (voice)
Acting
Alexa Davies
Sandwich Girl
Acting
Neville Phillips
Author
Acting
Ronan Summers
Security Man
Acting
Jud Charlton
Mortician
Acting
James Kermack
Policeman
Acting