Marlon Brando as Ken

Teresa Wright as Ellen

Everett Sloane as Dr. Brock

Jack Webb as Norm

Richard Erdman as Leo

Arthur Jurado as Angel

Virginia Farmer as Nurse Robbins

Dorothy Tree as Ellen's Mother

Howard St. John as Ellen's Father

Nita Hunter as Dolores

Patricia Joiner as Laverne

John Miller as Mr. Doolin

Cliff Clark as Dr. Kameran

Ray Teal as Man at Bar

Margarita Martín as Angel's Mother

Sayre Dearing as Bar Patron (uncredited)

John Hamilton as Justice of the Peace (uncredited)

DeForest Kelley as Dr. Sherman (uncredited)

William H. O'Brien as Nightclub Waiter (uncredited)

Frank O'Connor as Hospital Orderly (uncredited)

Polly Bergen as Nightclub Singer (Uncredited)