Delphine Seyrig as A – The Brunette Woman

Giorgio Albertazzi as X – The man with the Italian Accent

Sacha Pitoëff as M – The Other Man with the Lean Face, The Husband

Françoise Bertin as A Character from the Hotel

Luce Garcia-Ville as A Character from the Hotel

Héléna Kornel as A Character from the Hotel

Françoise Spira as A Character from the Hotel

Karin Toche-Mittler as A Character from the Hotel

Pierre Barbaud as A Character from the Hotel

Wilhelm von Deek as A Character from the Hotel

Jean Lanier as A Character from the Hotel

Gérard Lorin as A Character from the Hotel

Davide Montemurri as A Character from the Hotel

Gilles Quéant as A Character from the Hotel

Gabriel Werner as A Character from the Hotel