Robert Lamoureux

~ as ~

Robert Langlois, law student

Fernand Ledoux

~ as ~

Fernand Langlois, father, professor

Gaby Morlay

~ as ~

Gabrielle Langlois, mother

Nicole Courcel

~ as ~

Catherine Liseray, young neighbor

Louis de Funès

~ as ~

Mr. Calomel, neighbor on the floor above

Gaston Modot

~ as ~

Street violinist

Madeleine Barbulée

~ as ~

Marie-Louise, first maid

Yolande Laffon

~ as ~

Madeleine Sautaupain, Mom's friend

Robert Rollis

~ as ~

Léon “Alibi”, friend of Robert

Sophie Sel

~ as ~

Student of Mr. Langlois