Diagnosed with leukemia, a successful orchestra conductor learns that he is adopted, and his younger brother is in a village marching band. The conductor decides to help them win a regional contest.
Unfortunately the movie Marching Band is not yet available on HBO Max.
| Directing | Emmanuel Courcol | Director |
| Production | Emmanuelle Prévost | Casting |
| Writing | Emmanuel Courcol | Screenplay |
| Writing | Irène Muscari | Screenplay |
| Production | Marc Bordure | Producer |
| Production | Marie-Frédérique Lauriot-Dit-Prévost | Production Director |
| Camera | Maxence Lemonnier | Director of Photography |
| Production | Mathieu Lacote | Assistant Location Manager |
| Sound | Alexandre Tanguy | Music Editor |
| Art | Zoé Lorentz | First Assistant Art Direction |
| Camera | Jean-Marc Duez | Grip |
| Lighting | Mariore Manneville | Gaffer |
| Sound | Alphonse Armant | Boom Operator |
| Sound | Quentin Avrillon | Boom Operator |
| Directing | Camille Smagghe | Third Assistant Director |
| Directing | Sylvain Yonnet | Second Assistant Director |
| Sound | Niels Barletta | Sound Re-Recording Mixer |
| Art | Marielle Heintz | Assistant Decorator |
| Sound | Pascal Armant | Sound Mixer |
| Art | Bérengère Barthélémy | Location Scout |
| Editing | Guerric Catala | Editor |
| Sound | Sandy Notarianni | Supervising Sound Editor |
| Sound | Steve Bouyer | Music Supervisor |
| Sound | Pascal Mayer | Music Supervisor |
| Art | Sébastien Casanova | Property Master |
| Sound | Grégory Vincent | Foley Artist |
| Camera | Théo Benincasa | Second Assistant Camera |
| Directing | Ludovic Giraud | First Assistant Director |
| Sound | Michel Petrossian | Original Music Composer |
| Production | Robert Guédiguian | Producer |
| Art | Rafaël Mathé | Production Design |
| Costume & Make-Up | Christel Birot | Costume Design |
