Robert Langlois, law student

Fernand Langlois, father, professor

Gabrielle Langlois, mother

Catherine Liseray, young neighbor

Mr. Calomel, neighbor on the floor above

Street violinist

Marie-Louise, first maid

Madeleine Sautaupain, Mom's friend

Léon “Alibi”, friend of Robert

Student of Mr. Langlois

Neighborhood butcher

Nicole

Germaine, secretary

Little Sylvie

Maid

Second comrade

Prompter at the performance

Neighbor of the building

Notary

Amateur

Gaston, neighbor on the sixth floor, under the roofs

Maître Pillat, of the council of the bar association

Little Sylvie (uncredited)

Parent (uncredited)

(uncredited)

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

Comrade of Léon (uncredited)

Man who separates from his wife (uncredited)

(uncredited)

(uncredited)

Spectator who didn't have dinner (uncredited)

Un voisin célibataire (uncredited)

(uncredited)

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

Henriette (uncredited)

Spectator came to criticize (uncredited)

(uncredited)

Spectator with the bulky hair (uncredited)

(uncredited)

Uncle (uncredited)

(uncredited)

(uncredited)