Jean Poiret as William Harrisson

Michel Serrault as Jimmy Scott

Jacqueline Gauthier as Jimmy Scott

Blanchette Brunoy as Maggie Scott

Jean Sylvain as John

Marguerite Cassan as Zoé

Harry-Max as Henri, le maître d'hôtel

Yette Lucas as Maud

Annie Cariel as Miss Petitkton

Roger Saget as Le policeman