Gary Cooper
Frank Flannagan
Audrey Hepburn
Ariane Chavasse / Thin Girl
Maurice Chevalier
Claude Chavasse
John McGiver
Monsieur X
Van Doude
Michel
Lise Bourdin
Madame X
Olga Valéry
Hotel Guest with Dog
Paul Bonifas
Police Chief (uncredited)
Audrey Long
Brunette (uncredited)
Charles Lemontier
General (uncredited)
Eve Marley
Tandemist (uncredited)
Moustache
Butcher (uncredited)
Jean Ozenne
Ritz Receptionist (uncredited)
Marcelle Praince
Rich Woman (uncredited)
Betty Schneider
Couple Drenched by Water Wagon (uncredited)
Alexandre Trauner
Artist (uncredited)
Audrey Young
Frank's Opera Date (uncredited)
Jay A. Morley Jr.
Costume Design
Billy Wilder
Director
Hubert de Givenchy
Costume Design
Alexandre Trauner
Art Direction
Billy Wilder
Screenplay
William C. Mellor
Director of Photography
Christian Ferry
Location Manager
Lee Katz
Associate Producer
Chester W. Schaeffer
Editor
Ray Taylor Jr.
Assistant Director
Winifred Gibson
Script Supervisor
Albert Sendrey
Orchestrator
John G. Holden
Makeup Artist
Oliver Emert
Set Decoration
Edward Dodds
Production Manager
Paul Feyder
First Assistant Director
Noël Howard
Second Unit Director
Alain Boudet
Second Assistant Director
Lucie Lichtig
Script Supervisor
Maurice Barnathan
Set Dresser
Auguste Capelier
Assistant Art Director
Alexandre Trauner
Production Design
William Schorr
Associate Producer
Doane Harrison
Associate Producer
Del Harris
Sound Editor
Paul Feyder
Assistant Director
Robert Tracy
Music Editor
Joseph de Bretagne
Sound Recordist
Harry L. Underwood
Camera Operator
Billy Wilder
Producer
Claude Anet
Novel
Léonide Azar
Editor
I. A. L. Diamond
Screenplay