Anthony Perkins

~ as ~

Jimmy Piersall

Karl Malden

~ as ~

John Piersall

Norma Moore

~ as ~

Mary Piersall

Adam Williams

~ as ~

Doctor Brown

Perry Wilson

~ as ~

Mrs. John Piersall

Peter J. Votrian

~ as ~

Jim Piersall as a Boy

Richard Bull

~ as ~

Reporter Slade (uncredited)

Morgan Jones

~ as ~

Sandy Allen (uncredited)

Edd Byrnes

~ as ~

Boy in Car Assisting Jimmy Up Stairway (uncredited)

Brian G. Hutton

~ as ~

Bernie Sherwill (uncredited)