Robert Lamoureux

Robert Langlois, law student

Fernand Ledoux

Fernand Langlois, father, professor

Gaby Morlay

Gabrielle Langlois, mother

Nicole Courcel

Catherine Liseray, young neighbor

Louis de Funès

Mr. Calomel, neighbor on the floor above

Gaston Modot

Street violinist

Madeleine Barbulée

Marie-Louise, first maid

Yolande Laffon

Madeleine Sautaupain, Mom's friend

Robert Rollis

Léon “Alibi”, friend of Robert

Sophie Sel

Student of Mr. Langlois

Dominique Davray

Neighborhood butcher

Judith Magre

Germaine, secretary

Albert Michel

Prompter at the performance

René-Jean Chauffard

Neighbor of the building

Robert Le Béal

Amateur

Jacques Marin

Gaston, neighbor on the sixth floor, under the roofs

Jean Tissier

Maître Pillat, of the council of the bar association

Paul Bisciglia

Tenant on the sixth floor, under the roof (uncredited)

Christian Brocard

Comrade of Léon (uncredited)

Marcel Charvey

Man who separates from his wife (uncredited)

Henri Coutet

(uncredited)

Hubert Deschamps

Spectator who didn't have dinner (uncredited)

Jean-Paul Le Chanois

Spectateur (« Je ne vous dit rien ») (uncredited)

Dominique Marcas

Henriette (uncredited)

Bernard Musson

Spectator came to criticize (uncredited)

Laure Paillette

Spectator with the bulky hair (uncredited)

Fabien Loris

(uncredited)