La Métamorphose des cloportes

Lino Ventura Alphonse Maréchal aka 'Le Malin'

Charles Aznavour Edmond Clancul aka 'Le Naïf'

Irina Demick Catherine Verdier, manager of an art gallery

Maurice Biraud Arthur aka 'Le Mou'

Georges Géret Joseph Rouquemoute aka 'Le Rouquin'

Pierre Brasseur Demuldère aka 'Tonton le Brocanteur', receiver

Françoise Rosay Gertrude, supplies specialist in the mafia

Annie Fratellini Léone Rouqemoute, prostitute

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Norman Bart Gallery visitor

Georges Blaness Omar

Dorothée Blanck Girl at the hotel particulier

Marcel Charvey Gallery visitor