My Son John

Helen Hayes

as Lucille Jefferson

Van Heflin

as Stedman

Dean Jagger

as Dan Jefferson

Robert Walker

as John Jefferson

Minor Watson

as Dr. Carver

Frank McHugh

as Father O'Dowd

Richard Jaeckel

as Chuck Jefferson

James Young

as Ben Jefferson

Jimmie Dundee

as Taxi Driver (uncredited)

Douglas Evans

as Government Employee (uncredited)

Nancy Hale

as Nurse (uncredited)

Sam Harris

as Professor at Graduation Ceremony (uncredited)

Todd Karns

as Bedford (uncredited)

Leo McCarey

as John Jefferson (voice) (uncredited)

Lee Miller

as Policeman at Shooting Scene (uncredited)

David Newell

as FBI Agent (uncredited)

Vera Stokes

as Secretary (uncredited)

Fred Sweeney

as Cleaner (uncredited)

Margaret Wells

as Nurse (uncredited)