Mighty Joe Young

Terry Moore

Jill Young

Ben Johnson

Gregg Johnson

Robert Armstrong

Max O'Hara

Frank McHugh

Windy

Douglas Fowley

Jones

Denis Greene

Crawford

Paul Guilfoyle

Smith

Nestor Paiva

Brown

Regis Toomey

John Young

Lora Lee Michel

Jill (as a child)

James Flavin

Schultz

Mary Field

Secretary (uncredited)

Ellen Corby

Orphanage matron (uncredited)

Bess Flowers

Nightclub patron (uncredited)

Iris Adrian

Gloria (uncredited)

Jack Pennick

Sam (uncredited)