Mickey Rooney

~ as ~

Timothy Dennis

Edmund Gwenn

~ as ~

Headmaster Justin

Ian Hunter

~ as ~

Roger Carlton

Freddie Bartholomew

~ as ~

Peter Carlton

Marta Linden

~ as ~

Winifred Dennis Carlton

Juanita Quigley

~ as ~

Jane 'The Runt' Dennis

Alan Mowbray

~ as ~

Mr. Duncan

Peter Lawford

~ as ~

Ronnie Kenvil

Raymond Severn

~ as ~

'Inky' Weeld

Harry Duff

~ as ~

Eton Student (uncredited)