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)