Mickey Rooney

Character: Timothy Dennis

Edmund Gwenn

Character: Headmaster Justin

Ian Hunter

Character: Roger Carlton

Freddie Bartholomew

Character: Peter Carlton

Marta Linden

Character: Winifred Dennis Carlton

Juanita Quigley

Character: Jane 'The Runt' Dennis

Alan Mowbray

Character: Mr. Duncan

Peter Lawford

Character: Ronnie Kenvil

Raymond Severn

Character: 'Inky' Weeld

Harry Duff

Character: Eton Student (uncredited)

Robert Lynn

Character: Eton Student (uncredited)

Tina Thayer

Character: Flossie Sampson (uncredited)

Alan Napier

Character: Willow Club Restauranteur (uncredited)

Bess Flowers

Character: Party Guest (uncredited)