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