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)

William C. Mellor

Director of Photography

Billy Wilder

Screenplay

Jay A. Morley Jr.

Costume Design

Billy Wilder

Director

Alexandre Trauner

Art Direction

Hubert de Givenchy

Costume Design

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

Script Supervisor

Lee Katz

Associate Producer

Alexandre Trauner

Production Design

Paul Feyder

Assistant Director

Robert Tracy

Music Editor

William Schorr

Associate Producer

Doane Harrison

Associate Producer

Joseph de Bretagne

Sound Recordist

Del Harris

Sound Editor

Harry L. Underwood

Camera Operator

Billy Wilder

Producer

Léonide Azar

Editor

Claude Anet

Novel

I. A. L. Diamond

Screenplay