Michel Serrault as Albin Mougeotte / 'Zaza Napoli'

Ugo Tognazzi as Renato Baldi

Marcel Bozzuffi as Broca

Michel Galabru as Simon Charrier

Paola Borboni as Mrs. Baldi

Benny Luke as Jacob

Giovanni Vettorazzo as Milan

Glauco Onorato as Luigi

Roberto Bisacco as Ralph

Gianrico Tondinelli as Walter

Giorgio Cerioni as Gunther

Nazzareno Natale as Demis

Antonio Francioni as Michaux

Stelio Candelli as Hans

Mark Bodin as Caramel

Tom Felleghy as Andrew Manderstam

Renato Basso Bondini as Rouget

Nello Pazzafini as Mangin

Danilo Recanatesi as Dr. Boquillon

Lorenzo Dannon as Terrorist

Roberto Caporali as Terrorist Accomplice

Piero Morgia as Killer in Hotel

Roberto Dell'Acqua as Policeman

Riccardo Berlingeri as Desk Clerk, Hotel de Lys

Francis Missana as Handsome Young Man

Marie-Claude Douquet as Pretty Girl

Vito Fasano as Mangin's Man

Franco Beltramme as Mangin's Man

Giuseppe Mattei as Mangin's Men

Stéphane Audran as

Angelo Boscariol as Receptionist

Pierre Desmet as Proprietor, Le Roi du Bleu

Arnaldo Caivano as Train Passenger (uncredited)

Alba Maiolini as Baldi Family Woman (uncredited)

Lina Franchi as Baldi Family Woman (uncredited)

Umberto Amambrini as Baldi Family Man (uncredited)

Alfredo Capitani as Baldi Family Man (uncredited)