Robert Lamoureux
Role: Robert Langlois, law student
Fernand Ledoux
Role: Fernand Langlois, father, professor
Gaby Morlay
Role: Gabrielle Langlois, mother
Nicole Courcel
Role: Catherine Liseray, young neighbor
Louis de Funès
Role: Mr. Calomel, neighbor on the floor above
Gaston Modot
Role: Street violinist
Madeleine Barbulée
Role: Marie-Louise, first maid
Yolande Laffon
Role: Madeleine Sautaupain, Mom's friend
Robert Rollis
Role: Léon “Alibi”, friend of Robert
Sophie Sel
Role: Student of Mr. Langlois
Dominique Davray
Role: Neighborhood butcher
Françoise Hornez
Role: Nicole
Judith Magre
Role: Germaine, secretary
Alix Mahieux
Role: Little Sylvie
Jany Vallières
Role: Second comrade
Albert Michel
Role: Prompter at the performance
René-Jean Chauffard
Role: Neighbor of the building
Robert Le Béal
Role: Amateur
Jacques Marin
Role: Gaston, neighbor on the sixth floor, under the roofs
Jean Tissier
Role: Maître Pillat, of the council of the bar association
Martine Cuhaciender
Role: Little Sylvie (uncredited)
Léon Arvel
Role: Parent (uncredited)
Charles Bayard
Role: (uncredited)
Paul Bisciglia
Role: Tenant on the sixth floor, under the roof (uncredited)
Christian Brocard
Role: Comrade of Léon (uncredited)
Marcel Charvey
Role: Man who separates from his wife (uncredited)
Yvonne Constant
Role: (uncredited)
Henri Coutet
Role: (uncredited)
Hubert Deschamps
Role: Spectator who didn't have dinner (uncredited)
Édouard Francomme
Role: Un voisin célibataire (uncredited)
Benoîte Labb
Role: (uncredited)
Jean-Paul Le Chanois
Role: Spectateur (« Je ne vous dit rien ») (uncredited)
Dominique Marcas
Role: Henriette (uncredited)
Bernard Musson
Role: Spectator came to criticize (uncredited)
Gaëtan Noël
Role: (uncredited)
Laure Paillette
Role: Spectator with the bulky hair (uncredited)
Francia Seguy
Role: (uncredited)
Paul Villé
Role: Uncle (uncredited)
André Wasley
Role: (uncredited)
Fabien Loris
Role: (uncredited)