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