James Dean as Jim Stark

Natalie Wood as Judy

Sal Mineo as John 'Plato' Crawford

Jim Backus as Frank Stark

Ann Doran as Carol Stark

Corey Allen as Buzz Gunderson

William Hopper as Judy's Father

Rochelle Hudson as Judy's Mother

Dennis Hopper as Goon

Edward Platt as Ray Fremick

Steffi Sidney as Mil

Marietta Canty as Crawford Maid

Virginia Brissac as Jim's Grandmother

Beverly Long as Helen

Ian Wolfe as Dr. Minton

Frank Mazzola as Crunch

Robert Foulk as Gene

Jack Simmons as Cookie

Tom Bernard as Harry

Nick Adams as Chick

Jack Grinnage as Moose

Clifford Morris as Cliff

Almira Sessions as Planetarium Teacher (uncredited)

Paul Birch as Police Lieutenant (uncredited)

Dorothy Abbott as Nurse (uncredited)

Jimmy Baird as Beau (uncredited)

Paul Bryar as Desk Sergeant #2 (uncredited)

John Close as Police Officer (uncredited)

Chuck Hamilton as Police Desk Sergeant (uncredited)

Chuck Hicks as Ambulance Attendant (uncredited)

Nelson Leigh as Desk Sergeant #1 (uncredited)

David McMahon as Crunch's Father (uncredited)

Edward McNally as Approaching Officer (uncredited)

Peter Miller as Hoodlum (uncredited)

House Peters Jr. as Officer at Police Station (uncredited)

Nicholas Ray as Man in Last Shot (uncredited)

Gus Schilling as Attendant (uncredited)

Bert Stevens as Police Detective (uncredited)

Dick Wessel as Planetarium Guide (uncredited)

Robert B. Williams as Ed (uncredited)

Ralph Moratz as Boy at Planetarium (uncredited)

Skipper Huerta as Little Boy (uncredited)