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 |
| Production | Yannick Bernard | Producer |
| Editing | Catherine Quesemand | Editor |
| Costume & Make-Up | Monic Parelle | Costume Design |
| Directing | Jane Birkin | Assistant Director |
| Editing | Philippe Gasiorek | Assistant Editor |
| Editing | Nathalie Hubert | Assistant Editor |
| Camera | Catherine Strem | Camera Operator |
| Sound | Dominique Hennequin | Sound Mixer |
| Sound | Philippe Jantet | Sound Recordist |
| Sound | Jean-Claude Laureux | Sound |
| Sound | Jonathan Liebling | Foley |
| Sound | Fabien Adelin | Sound Re-Recording Mixer |
| Sound | Vincent Arnardi | Sound Re-Recording Mixer |
| Camera | Caroline Champetier | Director of Photography |
| Writing | Jean-François Goyet | Writer |
| Writing | Jacques Doillon | Writer |
| Writing | Arlette Langmann | Writer |
