"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)
William C. Mellor
Director of Photography
Billy Wilder
Screenplay
Jay A. Morley Jr.
Costume Design
Director
Art Direction
Hubert de Givenchy
Ray Taylor Jr.
Assistant Director
Maurice Barnathan
Set Dresser
Chester W. Schaeffer
Editor
Albert Sendrey
Orchestrator
Noël Howard
Second Unit Director
Alain Boudet
Second Assistant Director
Winifred Gibson
Script Supervisor
Edward Dodds
Production Manager
Paul Feyder
First Assistant Director
Oliver Emert
Set Decoration
Auguste Capelier
Assistant Art Director
Christian Ferry
Location Manager
John G. Holden
Makeup Artist
Lucie Lichtig
Lee Katz
Associate Producer
Production Design
Robert Tracy
Music Editor
William Schorr
Doane Harrison
Joseph de Bretagne
Sound Recordist
Del Harris
Sound Editor
Harry L. Underwood
Camera Operator
Producer
Léonide Azar
Claude Anet
Novel
I. A. L. Diamond