Dr. David Bowman
Dr. Frank Poole
Dr. Heywood Floyd
HAL 9000 (voice)
Moonwatcher
Dr. Andrei Smyslov
Elena
Dr. Ralph Halvorsen
Dr. Roy Michaels
Mission Controller (voice)
Astronaut
Aries-1B Lunar Shuttle Captain
Poole's Father
Poole's Mother
Aries-1B Stewardess
Stewardess
Ape
Ape Attacked by Leopard
Ape Killed by Moon-Watcher
Hostess in Elevator (uncredited)
Receptionist (uncredited)
Voice Print Identification Girl (uncredited)
Floyd's Daughter (uncredited)
BBC-12 Announcer (uncredited)
Miller (uncredited)
Interviewer (uncredited)
Young Man (uncredited)
(uncredited)
Russian Scientist (uncredited)
TMA-1 Site Photographer (uncredited)
TMA-1 Site Technician #1 (uncredited)
TMA-1 Site Technician #2 (uncredited)
(voice) (uncredited)
Moonwalker (uncredited)