Willy, a middle-aged divorcee, decides to take his 15 year-old son, Thomas, on holiday to Ibiza, staying at an isolated villa on the unspoilt part of the coast. Thomas insists on bringing his friend Juliette, a girl of his own age with whom he enjoys a close platonic relationship. When it comes to physical love, Juliette is wise beyond her years. She will only sleep with men older than herself and has no intention of committing herself to a long-term relationship.
Unfortunately the movie The 15 Year Old Girl is not yet available on HBO Max.
| Directing | Jacques Doillon | Director |
| Production | Mat Troi Day | Assistant Unit Manager |
| Sound | Dominique Hennequin | Sound Mixer |
| Editing | Philippe Gasiorek | Assistant Editor |
| Editing | Nathalie Hubert | Assistant Editor |
| Sound | Jean-Claude Laureux | Sound |
| Editing | Catherine Quesemand | Editor |
| Sound | Philippe Jantet | Sound Recordist |
| Camera | Catherine Strem | Camera Operator |
| Sound | Vincent Arnardi | Sound Re-Recording Mixer |
| Directing | Jane Birkin | Assistant Director |
| Production | Yannick Bernard | Producer |
| Sound | Fabien Adelin | Sound Re-Recording Mixer |
| Sound | Jonathan Liebling | Foley |
| Costume & Make-Up | Monic Parelle | Costume Design |
| Camera | Caroline Champetier | Director of Photography |
| Writing | Jean-François Goyet | Writer |
| Writing | Jacques Doillon | Writer |
| Writing | Arlette Langmann | Writer |
