Vo filme Planéta opíc hrajú Charlton Heston (George Taylor), Roddy McDowall (Cornelius), Kim Hunter (Zira), Maurice Evans (Dr. Zaius), James Whitmore (President of the Assembly), James Daly (Dr. Honorious), Linda Harrison (Nova), Robert Gunner (Landon), Lou Wagner (Lucius), Woodrow Parfrey (Dr. Maximus), Jeff Burton (Dodge), Buck Kartalian (Julius), Norman Burton (Hunt Leader), Wright King (Dr. Galen), Paul Lambert (Minister), Martin Abrahams (Human in Cage (uncredited)), Army Archerd (Gorilla (uncredited)), James Bacon (Ape (uncredited)), Erlynn Mary Botelho (Gorilla (uncredited)), Priscilla Boyd (Human #1 (uncredited)), Eldon Burke (Gorilla (uncredited)), David Chow (Chimpanzee (uncredited)), Billy Curtis (Child Ape (uncredited)), Frank Delfino (Child Ape (uncredited)), Buddy Douglas (Child Ape (uncredited)), Chuck Fisher (Gorilla (uncredited)), William Graeff Jr. (Gorilla (uncredited)), Lars Hensen (Gorilla (uncredited)), Irvin 'Zabo' Koszewski (Gorilla (uncredited)), Norma Jean Kron (Chimpanzee (uncredited)), Robert Lombardo (Gorilla Photographer (uncredited)), Jerry Maren (Child Ape (uncredited)), Cass Martin (Chimpanzee (uncredited)), Stephan Merjanian (Gorilla (uncredited)), Harry Monty (Child Ape (uncredited)), John Quijada (Gorilla (uncredited)), Smokey Roberds (Chimpanzee (uncredited)), Dave Rodgers (Gorilla (uncredited)), Jane Ross (Human (uncredited)), George Sasaki (Chimpanzee (uncredited)), Felix Silla (Child Gorilla (uncredited)), Emory Souza (Child Ape (uncredited)), Dianne Stanley (Astronaut Stewart (uncredited)), Joe Tornatore (Gorilla (uncredited)).