Cecil Parker
Role: Arthur Prohack
Dirk Bogarde
Role: Charles Prohack
Hermione Baddeley
Role: Eve Prohack
Sheila Sim
Role: Mary Prohack
Glynis Johns
Role: Mimi Warburton
Denholm Elliott
Role: Oswald Morfrey
Heather Thatcher
Role: Lady Maslam
Campbell Cotts
Role: Sir Paul Spinner
Frederick Valk
Role: Dr. Viega
Charles Goldner
Role: Polish Man Servant
Russell Waters
Role: Cartwright
Henry Edwards
Role: Sir Digby Bunce
James Hayter
Role: Carrell Quire
Ada Reeve
Role: Mrs. Griggs
Frances Waring
Role: Nursie
Judith Furse
Role: Laura Postern
Frederick Leister
Role: The Director General
Elwyn Brook-Jones
Role: Benny Erivangian
Eric Berry
Role: Tailor's Assistant (uncredited)
Janet Burnell
Role: Mr. Prohack's Personal Assistant (uncredited)
Ian Carmichael
Role: Hat Salesman (uncredited)
Anne Gunning
Role: Actress (uncredited)
Humphrey Heathcote
Role: Turkish Bath Attendant (uncredited)
Desmond Newling
Role: Pageboy (uncredited)
Lloyd Pearson
Role: Mr. Bishop (uncredited)
Stanelli
Role: Orchestra Leader (uncredited)
Jerry Verno
Role: Taxi Driver (uncredited)
Sam Lysons
Role: Club Porter
Charles Perry
Role: Butler
Robert Vossler
Role: Party Guest