Keir Dullea
Dr. David Bowman
Gary Lockwood
Dr. Frank Poole
William Sylvester
Dr. Heywood Floyd
Douglas Rain
HAL 9000 (voice)
Daniel Richter
Moonwatcher
Leonard Rossiter
Dr. Andrei Smyslov
Margaret Tyzack
Elena
Robert Beatty
Dr. Ralph Halvorsen
Sean Sullivan
Dr. Roy Michaels
Frank W. Miller
Mission Controller (voice)
Bill Weston
Astronaut
Ed Bishop
Aries-1B Lunar Shuttle Captain
Glenn Beck
Alan Gifford
Poole's Father
Ann Gillis
Poole's Mother
Edwina Carroll
Aries-1B Stewardess
Penny Brahms
Stewardess
Heather Downham
Mike Lovell
John Ashley
Ape
Jimmy Bell
David Charkham
Keith Denny
Jonathan Daw
Péter Delmár
Terry Duggan
Ape Attacked by Leopard
David Fleetwood
Danny Grover
Brian Hawley
David Hines
Anthony Jackson
John Jordan
Scott MacKee
Laurence Marchant
Darryl Paes
Joe Refalo
Andy Wallace
Bob Wilyman
Richard Woods
Ape Killed by Moon-Watcher
Maggie London
Hostess in Elevator (uncredited)
Chela Matthison
Receptionist (uncredited)
Judy Keirn
Voice Print Identification Girl (uncredited)
Vivian Kubrick
Floyd's Daughter (uncredited)
Kenneth Kendall
BBC-12 Announcer (uncredited)
Kevin Scott
Miller (uncredited)
Martin Amor
Interviewer (uncredited)
S. Newton Anderson
Young Man (uncredited)
Sheraton Blount
(uncredited)
Ann Bormann
Julie Croft
Penny Francis
Marcella Markham
Irena Marr
Russian Scientist (uncredited)
Krystyna Marr
Kim Neil
Jane Pearl
Penny Pearl
Burnell Tucker
TMA-1 Site Photographer (uncredited)
John Swindells
TMA-1 Site Technician #1 (uncredited)
John Clifford
TMA-1 Site Technician #2 (uncredited)
Stanley Kubrick
Astronaut Breathing (voice) (uncredited)
Harry Fielder
Moonwalker (uncredited)
