 | Tom Hudson als The Son as a Young Adult (voice) |
 | Baptiste Goy als The Son as a Child (voice) |
| Axel Devillers als The Son as a Baby (voice) |
 | Barbara Beretta als The Mother (voice) |
| Michael Dudok de Wit | Director |
| Tanguy Olivier | Production Manager |
| Bertrand Schutz | Assistant Director |
| Laurent Perez del Mar | Original Music Composer |
| Céline Kélépikis | Editor |
| Isao Takahata | Other |
| Toshio Suzuki | Producer |
| Pascal Caucheteux | Producer |
| Béatrice Mauduit | Producer |
| Alexandre Fleurant | Sound Designer |
| Michael Dudok de Wit | Adaptation |
| Michael Dudok de Wit | Screenplay |
| Michael Dudok de Wit | Storyboard |
| Bruno Seznec | Sound Supervisor |
| Sébastien Marquilly | Sound Designer |
| Vincent Maraval | Producer |
| Jean-Pierre Bouchet | First Assistant Director |
| Grégoire Sorlat | Producer |
| Fabien Devillers | Sound Mixer |
| Matthieu Michaux | Sound Editor |
| Valérie Schermann | Line Producer |
| Christophe Jankovic | Line Producer |
| Émilie Chaulet | Production Coordinator |
| Léon Pérahia | Co-Producer |
| Rémi Sagot-Duvauroux | Assistant Editor |
| Michael Dudok de Wit | Original Story |
| Pascale Ferran | Adaptation |
| Florian Fabre | Foley |
