Michel Simon
Albert Ménard-Lacoste / Alain Ménard-Lacoste
Louis de Funès
Emile, manvalet
Marguerite Pierry
Madeleine Lacoste
François Guérin
Pierre Lacoste
Laurence Badie
Geneviève Lacoste
Claude Gensac
Evelyne, chambermaid
Léon Walther
Maître Denisot, notary
Pauline Carton
Boss of the hotel
Lana Marconi
une prostituée, "la comtesse"
Marcel Pérès
Commissioner Vincent
Jacques Derives
Doctor from Roubaix
Marc Arian
Mr. Valembray, department head (uncredited)
Christine Vall
Maid (uncredited)
Sacha Guitry
Self in the prologue / Narrator (uncredited)
