- Director:
- Anthony Asquith.
- Unknown:
- Terence Rattigan
- Produced By:
- Anatole de Grunwald
- Directed By:
- Anthony Asquith
- Marquess of Frinton:
- Rex Harrison
- Marchioness of Frinton:
- Jeanne Moreau
- John Fane:
- Edmund Purdom
- Mae Jenkins:
- Shirley MacLaine
- Paolo Maltese:
- George C Scott
- Stefano:
- Alain Delon
- Gerda Millett:
- Ingrid Bergman
- Davich:
- Omar Sharif
- Lady St Simeon:
- Moira Lister
- Norwood:
- Roland Culver
- Harmsworth:
- Michael Hordern
- His assistant:
- Lance Percival
- Taylor:
- Harold Scott
- Albanian Ambassador:
- Gregoire Aslan
- Duchesse d'Angouleme:
- Isa Miranda
- Due d'Angoulême:
- Jacques Brunius
- Chauffeur:
- Richard Pearson
- Joey:
- Art Carney
- Bomba:
- Riccardo Garrone
- Miss Hortense Astor:
- Joyce Grenfell
- Ferguson:
- Wally Cox
- Mayor:
- Guy Deghy
- Chauffeur:
- Carlo Groccolo
- Waiter:
- Martin Miller
- Hotel manager:
- Andreas Malandrinos