Martin Freeman
Arthur Dent
Sam Rockwell
Zaphod Beeblebrox
Alan Rickman
Marvin (voice)
Anna Chancellor
Questular Rontok
Richard Griffiths
Jeltz (voice)
John Malkovich
Humma Kavula
Helen Mirren
Deep Thought (voice)
Thomas Lennon
Eddie the Computer (voice)
Stephen Fry
Narrator / The Guide (voice)
Bill Bailey
The Whale (voice)
Ian McNeice
Kwaltz (voice)
Steve Pemberton
Mr. Prosser
Mark Longhurst
Bulldozer Driver
Mak Wilson
Vogon Interpreter (voice)
Mark Gatiss
Additional Vogon Voices
Reece Shearsmith
Additional Vogon Voices
Mason Ball
Creature Performer
Sarah Bennett
Creature Performer
Danny Blackner
Creature Performer
Hayley Burroughs
Creature Performer
Cecily Fay
Creature Performer
Aron Freeman
Creature Performer
Ian Kay
Creature Performer
Nikki Bond
Creature Performer
Mohsen Nouri
Creature Performer
Oliver Parham
Creature Performer
Nigel Plaskitt
Creature Performer
Lynn Robertson Bruce
Creature Performer
Jerome St. John Blake
Vogon Soldier
Milo Bodrozic
Vogon Soldier
Martin Dawson
Vogon Soldier
Steve Grindle
Vogon Soldier
Rob Horseman
Vogon Soldier
Paul Nathaniel
Vogon Soldier
Jessie Riley
Vogon Soldier
Tucker Stevens
Vogon Soldier
Ashley Stuart
Vogon Soldier
Benjamin Uttley
Vogon Soldier
Patrick Walker
Vogon Soldier
Spencer Wilding
Vogon Soldier
William Wollen
Vogon Soldier
Edgar Wright
Deep Thought Technician (uncredited)
Jason Schwartzman
Gag Halfrunt (uncredited)
Mark Rhino Smith
Pall Bearer (uncredited)