Jean-Paul Belmondo as Mike Gaucher / Bruno Ferrari

Raquel Welch as Jane Gardner

Dany Saval as Doris

Charles Gérard as Hyacinthe

Raymond Gérôme as Le comte de Saint-Prix

Julien Guiomar as Fechner

Aldo Maccione as Sergio Campanese

Mario David as Santos

Henri Génès as Camille

Fred Personne as Le maire

Jean-Jacques as Philémon

Claude Chabrol as Le metteur en scène

François Mirante as Le directeur du supermarché

Josiane Balasko as La fille du supermarché

Martine Ferrière as L'assistante sociale

Georges Riquier as Le médecin de la sécurité sociale

Samson Fainsilber as Le vieux maquilleur

Jean-Jacques Moreau as Le chauffeur de taxi

Raphaëlle Devins as La cascadeuse

André Penvern as Stanislas, le directeur de production

Richard Bohringer as L'assistant-réalisateur

Georges Beller as Un assistant de Sergio

Isabelle Duby as La barmaid

Rita Maiden as L'infirmière chef

Hubert Laurent as L'interne

Gilles Kohler as Le chauffeur de Bruno

Maurice Illouz as Le technicien

Vincent Berger as Le môme

Marie Pillet as La concierge

Georges Yacoubian as Le voisin

Anne-Marie Coffinet as La patronne du bistrot

Agathe Vannier as La serveuse du bistrot

Jacques Alric as Le majordome

Maurice Bénichou as Le domestique

Hugo Curletto as Le photographe de Bruno

Paul Bisciglia as Le gardien du château

Henri Attal as L'assistant

Xavier Saint-Macary as Le chauffeur de Saint-Prix

François Guétary as Le secrétaire de Bruno

Didier Flamand as Le cousin de Saint-Prix

Eduardo Bergara Leumann as Le coiffeur de Bruno

Patrice Melennec as L'agent de police

Catherine Meurisse as La star

Michel Pilorgé as L'automobiliste

Michel Tugot-Doris as Un consommateur au bistrot

Lionel Vitrant as Le cameraman

Jean Cherlian as Un machiniste

Maurice Auzel as Le voisin de table

Arlette Emmery as La voisine de table

Gaston Meunier as Un invité au mariage

Yves Mourousi as Yves Mourousi

Johnny Hallyday as La vedette masculine

Jane Birkin as La vedette féminine