Robert Morley

as W.H. 'Harry' Derwent Blacker

Margaret Rutherford

as Catherine Beckwith / Jeremy St. Claire

Kay Kendall

as Sandra Beverley

Michael Medwin

as Jerry Winterton

Liam Gaffney

as Norwood Beverley

Olive Sloane

as Maud Baron

Lloyd Lamble

as Jackson

Charlotte Mitchell

as Daphne Ray