Charlotte Castang is a working-class 13-year-old girl, who lives in a drab, run-down neighbourhood, and is ready to become an adult. Her mother died giving birth to her, and she lives with her crass brother and a father whose attention is elsewhere. Her only friend is Lulu, a sick 10-year-old she regards as a pest. Charlotte is antisocial, bored and dreams of a better life. Her life improves when she meets Clara Bauman, a pianist prodigy.
Unfortunately the movie An Impudent Girl is not yet available on HBO Max.
| Writing | Annie Miller | Writer |
| Writing | Bernard Stora | Writer |
| Writing | Luc Béraud | Writer |
| Writing | Claude Miller | Writer |
| Directing | Claude Miller | Director |
| Production | Armand Barbault | Production Manager |
| Camera | Dominique Chapuis | Director of Photography |
| Sound | Alain Jomy | Original Music Composer |
| Editing | Albert Jurgenson | Editor |
| Production | Dominique Besnehard | Casting |
| Art | Jean-Pierre Kohut-Svelko | Production Design |
| Costume & Make-Up | Jacqueline Bouchard | Costume Design |
| Costume & Make-Up | Paul de Fisser | Hairstylist |
| Costume & Make-Up | Joël Lavau | Makeup Artist |
| Sound | Paul Lainé | Sound |
| Sound | Gérard Lamps | Sound Re-Recording Mixer |
| Sound | Jean-Pierre Lelong | Sound Effects |
| Sound | Nadine Muse | Sound Editor |
| Camera | Martine Peccoux | Still Photographer |
| Camera | Guillaume Schiffman | Second Assistant Camera |
| Camera | Thierry Jault | First Assistant Camera |
