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

Norman Bart

Gallery visitor

Georges Blaness

Omar

Dorothée Blanck

Girl at the hotel particulier

Marcel Charvey

Gallery visitor

François Dalou

Police inspector

Michel Dacquin

Nightclub bartender