Charlton Heston as George Taylor

Roddy McDowall as Cornelius

Kim Hunter as Zira

Maurice Evans as Dr. Zaius

James Whitmore as President of the Assembly

James Daly as Dr. Honorious

Linda Harrison as Nova

Robert Gunner as Landon

Lou Wagner as Lucius

Woodrow Parfrey as Dr. Maximus

Jeff Burton as Dodge

Buck Kartalian as Julius

Norman Burton as Hunt Leader

Wright King as Dr. Galen

Paul Lambert as Minister

Martin Abrahams as Human in Cage (uncredited)

Army Archerd as Gorilla (uncredited)

James Bacon as Ape (uncredited)

Erlynn Mary Botelho as Gorilla (uncredited)

Priscilla Boyd as Human #1 (uncredited)

Eldon Burke as Gorilla (uncredited)

David Chow as Chimpanzee (uncredited)

Billy Curtis as Child Ape (uncredited)

Frank Delfino as Child Ape (uncredited)

Buddy Douglas as Child Ape (uncredited)

Chuck Fisher as Gorilla (uncredited)

William Graeff Jr. as Gorilla (uncredited)

Lars Hensen as Gorilla (uncredited)

Irvin 'Zabo' Koszewski as Gorilla (uncredited)

Norma Jean Kron as Chimpanzee (uncredited)

Robert Lombardo as Gorilla Photographer (uncredited)

Jerry Maren as Child Ape (uncredited)

Cass Martin as Chimpanzee (uncredited)

Stephan Merjanian as Gorilla (uncredited)

Harry Monty as Child Ape (uncredited)

John Quijada as Gorilla (uncredited)

Smokey Roberds as Chimpanzee (uncredited)

Dave Rodgers as Gorilla (uncredited)

Jane Ross as Human (uncredited)

George Sasaki as Chimpanzee (uncredited)

Felix Silla as Child Gorilla (uncredited)

Emory Souza as Child Ape (uncredited)

Dianne Stanley as Astronaut Stewart (uncredited)

Joe Tornatore as Gorilla (uncredited)