- Thomas Chelimsky - Jean-Louis Gaudel
- Marc Arian - Subway Passenger (uncredited)
- Claudine Berg - Maid (uncredited)
- Marcel Bernier - Taxi Driver (uncredited)
- Albert Daumergue - Man in Stamp Market (uncredited)
- Raoul Delfosse - Taxi Driver (uncredited)
- Stanley Donen - Man in Elevator (voice) (uncredited)
- Jean Gold - Writer On Cafe Terrace (uncredited)
- Chantal Goya - (uncredited)
- Clément Harari - German Tourist (uncredited)
- Monte Landis - Master of Ceremonies at Club (uncredited)
- Bernard Musson - Hotel Receptionnist (uncredited)
- Antonio Passalia - Italian Representative at URESCO (uncredited)
- Jacques Préboist - Ice Cream Salesman (uncredited)
- Peter Stone - Man in Elevator / Marine (voice) (uncredited)
- Michel Thomass - Embassy Driver (uncredited)
- Roger Trapp - Mortuary Employee (uncredited)
- Louis Viret - Hallmark Employee On Subway (uncredited)
- Stanley Donen
- Marc Maurette
- Peter Stone
- Peter Stone
- Stanley Donen
- Henry Mancini
- Henry Mancini
- Johnny Mercer
Cary Grant interpreta a Peter Joshua en la película.
Audrey Hepburn interpreta a Regina Lampert en la película.
Walter Matthau interpreta a Hamilton Bartholemew en la película.
James Coburn hace el papel de Tex Panthollow.
George Kennedy interpreta a Herman Scobie en la película.
Dominique Minot interpreta a Sylvie Gaudel en la película.
Ned Glass interpreta a Leopold Gideon en la película.
Jacques Marin interpreta a Edouard Grandpierre en la película.
Paul Bonifas hace el papel de Mr. Felix.
Thomas Chelimsky interpreta a Jean-Louis Gaudel en la película.
Marc Arian interpreta a Subway Passenger (uncredited) en la película.
Claudine Berg interpreta a Maid (uncredited) en la película.
Marcel Bernier interpreta a Taxi Driver (uncredited) en la película.
Albert Daumergue hace el papel de Man in Stamp Market (uncredited).
Raoul Delfosse hace el papel de Taxi Driver (uncredited).
Stanley Donen hace el papel de Man in Elevator (voice) (uncredited).
Jean Gold hace el papel de Writer On Cafe Terrace (uncredited).
Chantal Goya hace el papel de (uncredited).
Clément Harari interpreta a German Tourist (uncredited) en la película.
Monte Landis interpreta a Master of Ceremonies at Club (uncredited) en la película.
Bernard Musson interpreta a Hotel Receptionnist (uncredited) en la película.
Antonio Passalia interpreta a Italian Representative at URESCO (uncredited) en la película.
Jacques Préboist interpreta a Ice Cream Salesman (uncredited) en la película.
Peter Stone hace el papel de Man in Elevator / Marine (voice) (uncredited).
Michel Thomass interpreta a Embassy Driver (uncredited) en la película.
Roger Trapp interpreta a Mortuary Employee (uncredited) en la película.
Louis Viret interpreta a Hallmark Employee On Subway (uncredited) en la película.
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