Marcello Mastroianni as Nicolas Montei

Jean Rochefort as Clément Chamfort

Françoise Fabian as Peggy

Evelyne Buyle as La débutante qui joue Bérénice

Sylvie Joly as La femme du photographe

Carla Gravina as Elisabeth Montei

Maurice Barrier as René, un acteur

Maurice Risch as un photographe

Robert Dalban as le réceptionniste de l'hôtel

Dominique De Keuchel as Rodrigue Montei

Gérard Jugnot as un technicien (uncredited)

Yves Robert as le metteur en scène de théâtre (uncredited)

Xavier Gélin as Zeller, un jeune réalisateur (uncredited)