Cadogan de Vere Carlton-Browne
Terry-Thomas
Prime Minister Amphibulos
Peter Sellers
Sir John Farthing
Ronald Adam
Hewitt
John Van Eyssen
Rodgers
Nicholas Parsons
Mrs. Carter
Irene Handl
Gaillardian commentator
Harry Locke
Security Officer
Basil Dignam
Signaller
Sam Kydd
Major Miller
Robert Bruce
Newsreel Interviewer
John Glyn-Jones
Woman In Cinema
Marianne Stone
Princess Ilyena
Luciana Paluzzi
Dancer
Kathryn Keeton
Onlooker
Margaret Lacey
Archivist
Robert S. Young
Sir John's Assistant (uncredited)
Kenneth Griffith
Deputy Minister (uncredited)
Mario Fabrizi
Young King Loris
Ian Bannen
Colonel Bellingham
Thorley Walters
Foreign Secretary Tufton-Slade
Raymond Huntley
Resident Advisor Davidson
Miles Malleson
Grand Duke Alexis
John Le Mesurier
Lady Carlton-Browne
Marie Lohr
Sir Arthur Carlton-Browne
Kynaston Reeves
Director
Roy Boulting
Story
Producer
John Boulting
Jeffrey Dell
Music
John Addison