A mother of two gathers her loved ones to celebrate her birthday in her big house near the Loire Valley. The festivities are disrupted by the arrival of her daughter, who is known for her unpredictable outbursts.
Unfortunately the movie Happy Birthday is not yet available on HBO Max.
| Directing | Cédric Kahn | Director |
| Writing | Cédric Kahn | Writer |
| Production | Sylvie Pialat | Producer |
| Camera | Yves Cape | Director of Photography |
| Art | Guillaume Deviercy | Production Design |
| Costume & Make-Up | Alice Cambournac | Costume Designer |
| Editing | Yann Dedet | Editor |
| Sound | Thomas Gauder | Sound Recordist |
| Sound | Sylvain Malbrant | Sound Recordist |
| Sound | Jean-Pierre Duret | Sound Recordist |
| Writing | Fanny Burdino | Writer |
| Writing | Samuel Doux | Writer |
