Marlon Brando as Rio

Karl Malden as Sheriff Dad Longworth

Katy Jurado as Maria Longworth

Ben Johnson as Bob Amory

Slim Pickens as Deputy Lon Dedrick

Larry Duran as Chico Modesto

Sam Gilman as Harvey Johnson

Timothy Carey as Howard Tetley

Miriam Colon as Redhead

Elisha Cook Jr. as Carvey

Rodolfo Acosta as Mexican Rurale Captain

Ray Teal as Barney

John Dierkes as Chet

Philip Ahn as Uncle

Margarita Cordova as Nika Flamenco Dancer

Hank Worden as Doc

Clem Harvey as Tim

William Forrest as Banker

Mina Martinez as Margarita

Pina Pellicer as Louisa

John George as Townsman (uncredited)

Harry 'Snub' Pollard as Townsman (uncredited)

Bert Stevens as Townsman (uncredited)

Sheryl Deauville as Marina (uncredited)