Un monsieur de compagnie

Jean-Pierre Cassel

Antoine Mirliflor

Irina Demick

Nicole

Catherine Deneuve

Isabelle

Annie Girardot

Clara

Jean-Pierre Marielle

Balthazar

Sandra Milo

Maria

Marcel Dalio

Socratès

Jean-Claude Brialy

The Prince

Paolo Stoppa

Professor Gaetano

Adolfo Celi

Benvenuto

Valérie Lagrange

Louisette

André Luguet

Antoine's grandfather

Irène Chabrier

Ernestine

Renée Passeur

The boss

Rosy Varte

Isabelle's Mother

Sacha Briquet

Authorized signatory

Jacques Dynam

Isabelle's Father

Christian Lude

Notary

Robert Blome

Prince's servant (uncredited)

Memmo Carotenuto

Policeman in Rome (uncredited)