The residents of the apartment building on Rue Montmartre are a motley crew of oddballs and eccentrics. The daring son of a professor couple is in love with a sexy student who supplements her pocket money by working as an au pair. And then there's Monsieur Calomel, the crazy but helpful neighbor who's always ready with a funny face...
as Robert Langlois, law student
as Fernand Langlois, father, professor
as Gabrielle Langlois, mother
as Catherine Liseray, young neighbor
as Mr. Calomel, neighbor on the floor above
as Street violinist
as Marie-Louise, first maid
as Madeleine Sautaupain, Mom's friend
as Léon “Alibi”, friend of Robert
as Student of Mr. Langlois
as Neighborhood butcher
as Nicole
as Germaine, secretary
as Little Sylvie
as Maid
as Second comrade
as Prompter at the performance
as Neighbor of the building
as Notary
as Amateur
as Gaston, neighbor on the sixth floor, under the roofs
as Maître Pillat, of the council of the bar association
as Little Sylvie (uncredited)
as Parent (uncredited)
as (uncredited)
as Tenant on the sixth floor, under the roof (uncredited)
as Comrade of Léon (uncredited)
as Man who separates from his wife (uncredited)
as (uncredited)
as (uncredited)
as Spectator who didn't have dinner (uncredited)
as Un voisin célibataire (uncredited)
as (uncredited)
as Spectateur (« Je ne vous dit rien ») (uncredited)
as Henriette (uncredited)
as Spectator came to criticize (uncredited)
as (uncredited)
as Spectator with the bulky hair (uncredited)
as (uncredited)
as Uncle (uncredited)
as (uncredited)
as (uncredited)
