Martin Freeman

Arthur Dent

Yasiin Bey

Ford Prefect

Zooey Deschanel

Trillian

Sam Rockwell

Zaphod Beeblebrox

Alan Rickman

Marvin (voice)

Anna Chancellor

Questular Rontok

Bill Nighy

Slartibartfast

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)

Warwick Davis

Marvin

Bill Bailey

The Whale (voice)

Dominique Jackson

Fook

Simon Jones

Ghostly Image

Kelly Macdonald

Reporter

Ian McNeice

Kwaltz (voice)

Steve Pemberton

Mr. Prosser

Albie Woodington

Barman

Mak Wilson

Vogon Interpreter (voice)

Mark Gatiss

Additional Vogon Voices

Reece Shearsmith

Additional Vogon Voices

Hayley Burroughs

Creature Performer

Cecily Fay

Creature Performer

Ian Kay

Creature Performer

Jerome St. John Blake

Vogon Soldier

Simon Hibbs

Vogon Soldier

Benjamin Uttley

Vogon Soldier

Spencer Wilding

Vogon Soldier

Edgar Wright

Deep Thought Technician (uncredited)

Jason Schwartzman

Gag Halfrunt (uncredited)

Mark Rhino Smith

Pall Bearer (uncredited)