La moucharde stars Dany Carrel as a young miss who loves neither wisely nor well. Duped into a life of crime, Carrel remains on the wrong side of the Law because she's hopelessly in love with a two-bit crook. Soon she becomes as jaded and hardened as her criminal cohorts. When the police threaten to throw her in the Bastille, Carrel agrees to turn informer, with the expected disastrous results.
| Actor | Role |
|---|---|
 Dany CarrelBetty Lefébure | Betty Lefébure |
 Georges ChamaratJeweler | Jeweler |
 Henri CrémieuxMr. Eddy | Mr. Eddy |
 Noël RoquevertMaître Perceval | Maître Perceval |
 Pierre VaneckFrédéric Martignac, aka Fred | Frédéric Martignac, aka Fred |
 Yves DeniaudParola, second-hand dealer | Parola, second-hand dealer |
| FFlorence BlotMrs. Michaud | Mrs. Michaud |
 Maurice ChevitConsumer (uncredited) | Consumer (uncredited) |
 Yvonne ClechLucienne | Lucienne |
 Paul CrauchetPhotograph | Photograph |
 Albert DinanLefébure, father of Betty | Lefébure, father of Betty |
 Jean MorelCommissioner Mallet | Commissioner Mallet |
 Fernand SardouMario the Toulonnais | Mario the Toulonnais |
 Serge SauvionMaurice | Maurice |
 André WeberJeannot | Jeannot |
 Anne-Marie CoffinetNot listed | Not listed |
 Jacques Dhéry(uncredited) | (uncredited) |
 Lisa Jouvet(uncredited) | (uncredited) |