William Holden

as Richard Benson

Audrey Hepburn

as Gabrielle Simpson

Grégoire Aslan

as Inspector Gilet

Raymond Bussières

as François

Christian Duvaleix

as Maitre d'Hotel

Michel Thomass

as Gangster (as Thomas Michel)

Dominique Boschero

as Girl at Pool

Evi Marandi

as Girt at Pool