Once upon a time, there was a pedunculate oak (Quercus robur), born in 1810, 210 years old and a pillar in its kingdom. This spectacular adventure features an extraordinary cast: squirrels, barnacles, jays, ants, field mice... This vibrant, whirring, marvelous little world seals its destiny around the majestic tree that welcomes them, feeds them and protects them from its roots to its crown. A poetic ode to life, in which nature alone expresses itself.
Unfortunately the movie Heart of an Oak is not yet available on HBO Max.
| Sound | Cyrille Aufort | Original Music Composer |
| Directing | Michel Seydoux | Director |
| Directing | Laurent Charbonnier | Director |
| Sound | Martine Todisco | Sound |
| Directing | Cynthia Sicco | Second Assistant Director |
| Art | Morgane Baux | Set Decoration |
| Crew | Edgar Raclot | Machinist |
| Crew | Arthur Ehret | Machinist |
| Camera | Nicolas Kiechel | Grip |
| Lighting | Hugo Mesnil | Electrician |
| Crew | Benoît Squizzato | Special Effects Assistant |
| Crew | Lisa Humblot | Animal Coordinator |
| Crew | Paul Lefranc | Animal Coordinator |
| Camera | Sylvain Viricel | Camera Operator |
| Art | Stéphane Viola | Assistant Decorator |
| Sound | Oriane Carcy | Musician |
| Production | Barthélémy Fougea | Producer |
| Directing | Julien Le Roux | Assistant Director |
| Camera | Antoine Machon | Drone Pilot |
| Crew | Jean-Marc Dupuy | Machinist |
| Camera | Mathieu Giombini | Director of Photography |
| Camera | Mathieu Reymond | Drone Pilot |
| Camera | Laurent Charbonnier | Camera Operator |
| Art | Camille Rochette | Set Decoration |
| Crew | Jean-Louis Bonnet | Special Effects Assistant |
| Crew | Guillaume Poyet | Technical Advisor |
| Camera | Samuel Guiton | Camera Operator |
| Art | Juliette Bailly | Painter |
| Crew | Alain Perthuis | Animal Coordinator |
| Editing | Sylvie Lager | Editor |
| Visual Effects | Arnaud Fouquet | Imaging Science |
| Crew | Maxime Perrard | Machinist |
| Lighting | Jérémy Lesquenner | Electrician |
| Art | Judith Lanjouere-Croux | Assistant Decorator |
| Writing | Michel Fessler | Writer |
| Visual Effects | Olivier Zenenski | Special Effects Supervisor |
| Crew | Guillaume Poyet | Animal Coordinator |
| Art | David Faivre | Decorator |
| Writing | Dominique Mansion | Co-Writer |
| Directing | Lucie Calvez | Assistant Director Trainee |
| Camera | Théodule Carré-Cassaigne | Second Assistant Camera |
| Camera | Guillaume Marion | Drone Pilot |
| Art | Emmanuelle Imbs | Assistant Decorator |
| Art | Lionel Dijoux | Construction Manager |
| Sound | Philippe Penot | Sound |
| Camera | Martin Livet | First Assistant Camera |
| Camera | Antoine Lagarde | Drone Pilot |
| Art | Véronique Lorne | Head Decorator |
| Art | Vincent Copéret | Storyboard Designer |
| Writing | Laurent Charbonnier | Original Concept |
| Art | Sophia Daverdon | Assistant Decorator |
| Production | Melanie Grywnow | Administration |
| Writing | Karine Winczura | Co-Writer |
| Camera | Olivier Bertrand | First Assistant Camera |
| Camera | Damien Vicart | Drone Pilot |
| Art | Ombeline Lévêque | Assistant Decorator |
| Lighting | Romain Mosti | Electrician |
| Production | Hugo Man | Controller |
| Production | Manon Alonzo | Production Assistant |
| Production | Alexandre Requintel | Assistant Location Manager |
| Art | Vincent Copéret | Storyboard Artist |
| Sound | Samy Bardet | Sound |
| Art | Sarah Schneider | Assistant Decorator |
| Art | Théa Lambours | Assistant Decorator |
| Camera | Yann Cannamela | Grip |
| Writing | Michel Seydoux | Writer |
| Production | Lola Adamo | Production Secretary |
| Production | Salomé Lacœuilhe | Production Trainee |
| Production | Michel Seydoux | Producer |
| Camera | Christophe Pottier | Camera Operator |
| Camera | Charles Kapandji | Second Assistant Camera |
| Camera | Léa Charnier | Camera Trainee |
| Lighting | Arthur Barrow | Electrician |
| Lighting | Mathieu Mouterde | Electrician |
| Sound | Marc Doisne | Sound |
| Camera | Rousslan Dion | Camera Operator |
| Art | Mathilde Kefelian | Assistant Decorator |
| Crew | Muriel Bec | Animal Coordinator |
| Editing | Mathilde Louveau | Assistant Editor |
| Production | Philippe Baisadouli | Production Director |
| Art | Noé Dijoux | Assistant Decorator |
| Art | Lucie Legrand | Painter |
| Art | Maël Gaudin | Construction Manager |
| Crew | Charly Belk | Animal Coordinator |
| Crew | Juliette Mazingarbe | Animal Coordinator |
| Crew | Inès Lefranc | Animal Coordinator |
| Crew | Gérard Bertrand | Animal Coordinator |
| Production | Ariane Guez | Controller |
| Production | Malia Bouchareb | Assistant Location Manager |
| Production | Sébastien Brun | Assistant Location Manager |
| Crew | Benjamin Viau | Mixing Engineer |
| Crew | Tommy Pelletier | Animal Coordinator |
| Sound | Cyrille Aufort | Orchestrator |
| Crew | Marine Blanchet | Animal Coordinator |
| Production | Marc Chipan | Controller |
| Production | Jérôme Mauzet | General Manager |
| Production | Hugo Hincelin | Assistant Location Manager |
| Production | Christophe Pierrot | Assistant Location Manager |
| Production | Yacine Fougea | Assistant Location Manager |
| Crew | Karim Daoues | Animal Coordinator |
| Sound | Varda Kabon | Supervising Music Editor |
| Crew | Sébastien Pierre | Mixing Engineer |
| Sound | Mikhaël Kurc | Sound Assistant |
| Sound | Emmanuel André | Musician |
| Editing | Aurélie Leymarie | Assistant Editor |
| Production | Vincent Robillard | Assistant Location Manager |
| Production | Anne-Marie Loridant | Assistant Location Manager |
| Production | Antoine Lebas | Assistant Location Manager |
| Sound | Yona Azoulay | Supervising Music Editor |
| Sound | Akémi Fillon | Musician |
| Production | Matthias Abrantes | Assistant Location Manager |
| Sound | Dominique Schmit | Dolby Consultant |
| Sound | Stéphane Reichart | Music Programmer |
| Production | Jérémy Gueudin | Assistant Location Manager |
| Sound | Matis Alexandre | Sound Assistant |
| Sound | Anne Gravoin | Musician |
| Editing | Stéphane Gallet | Assistant Editor |
| Sound | Julie Gehan-Rodriguez | Musician |
| Crew | Jean-Charles Etien | Machinist |
| Crew | Johann Nallet | Mixing Engineer |
| Crew | Grégoire Benzaquen | Machinist |
| Crew | Loup Hubin | Special Effects Technician |
