The eponymous garçonne or flapper is Monique Lerbier, an emancipated French woman who leaves home to escape a marriage of convenience to a man she does not love which her parents have forced on her. She then falls into all sorts of carnal temptations and artificial pleasures previously unknown to her. These include her being seduced into a lesbian love affair by a chanteuse.
Marie Bell
as Monique Lerbier, la garçonne
Arletty
as Niquette
Henri Rollan
as Régis Boisselot
Jean Worms
as Lerbier
Maurice Escande
as Lucien Vigneret
Édith Piaf
as Chanteuse
Marcelle Praince
as Madame Lerbier
Marcelle Géniat
as Tante Sylvestre
Suzy Solidor
as Anika
Vanda Gréville
as Élisabeth
Jaque Catelain
as Georges Blanchet
Pierre Etchepare
as Plombino