Adventure awaits 12 year old Brendan who must fight Vikings and a serpent god to find a crystal and complete the legendary Book of Kells. In order to finish Brother Aiden's book, Brendan must overcome his deepest fears on a secret quest that will take him beyond the abbey walls and into the enchanted forest where dangerous mythical creatures hide. Will Brendan succeed in his quest?
Unfortunately the movie The Secret of Kells is not yet available on HBO Max.
| Production | Viviane Vanfleteren | Producer |
| Sound | Bruno Coulais | Original Music Composer |
| Sound | Kila | Music |
| Writing | Fabrice Ziolkowski | Writer |
| Production | Didier Brunner | Producer |
| Directing | Nora Twomey | Director |
| Visual Effects | Tom Caulfield | Animation |
| Production | Paul Young | Producer |
| Crew | Jean-Paul Commin | Thanks |
| Crew | David Max Freedman | Thanks |
| Crew | Philippe Reynaert | Thanks |
| Production | Lydie Tedesco | Administration |
| Crew | Danielle Raaphorst | Thanks |
| Editing | Fabienne Alvarez-Giro | Editor |
| Crew | Eleni Chandrinou | Thanks |
| Crew | Stéphanie Hugé | Thanks |
| Crew | Nessa King | Thanks |
| Crew | Sjef Scholte | Thanks |
| Visual Effects | Pierre Cambier | 3D Animator |
| Crew | Barry O'Donoghue | Thanks |
| Crew | Karla Puttemans | Thanks |
| Crew | Patrick Schoeters | Thanks |
| Production | James Flynn | Executive Producer |
| Visual Effects | Olivia Carpentier | 3D Animator |
| Visual Effects | Francis Combes | 3D Animator |
| Visual Effects | Freek Quartier | 3D Animator |
| Visual Effects | Tom Van Gestel | 3D Animator |
| Crew | Claire Paoletti | Thanks |
| Visual Effects | Herle Maria Kühl | Animation Supervisor |
| Crew | Fx Goby | Thanks |
| Visual Effects | Darko Belevski | Animation Supervisor |
| Crew | Aidan Harte | Thanks |
| Crew | Jonas Kestemont | Thanks |
| Crew | Naomi Kestemont | Thanks |
| Crew | Roxanne Burchartz | Thanks |
| Crew | Hans Everaert | Thanks |
| Crew | Pierre Héros | Thanks |
| Crew | Sara Wikler | Thanks |
| Production | Jérôme Larivet | Administration |
| Visual Effects | Marie-Laure Guisset | Animation Supervisor |
| Crew | Sarah Carmody | Thanks |
| Crew | Brendan McCarthy | Thanks |
| Crew | Caroline Cor | Thanks |
| Crew | Jean-Luc Fromental | Thanks |
| Production | Serge Colibert | Administration |
| Visual Effects | Benoît Féroumont | Animation Supervisor |
| Crew | Louise Curran | Thanks |
| Production | Ivan Rouvreure | Executive Producer |
| Visual Effects | Samuel Brasseur | 3D Animator |
| Crew | Mark Woods | Thanks |
| Visual Effects | Fabian Erlinghäuser | Animation Supervisor |
| Crew | Siebe Dumon | Thanks |
| Crew | Brendan McCaul | Thanks |
| Visual Effects | Dominique Gantois | 3D Animator |
| Crew | Rod Stoneman | Thanks |
| Crew | Inge Verroken | Thanks |
| Art | Ross Stewart | Art Direction |
| Visual Effects | Pascal Vermeersch | Animation |
| Sound | Fabien Devillers | Sound Re-Recording Mixer |
| Visual Effects | Pascal Maoloni | Animation |
| Camera | Rémi Chayé | Second Unit Director of Photography |
| Sound | Alexandre Fleurant | Sound Editor |
| Visual Effects | Jean Morel | Animation |
| Visual Effects | Joke Eycken | Animation |
| Visual Effects | Rudi Mertens | Animation |
| Sound | Jean-Philippe Audin | Musician |
| Visual Effects | Elie Klimis | Animation |
| Sound | Sébastien Marquilly | Sound Designer |
| Directing | Rémi Chayé | First Assistant Director |
| Sound | Eoin Dillon | Musician |
| Production | Camille Leganza | Executive In Charge Of Production |
| Visual Effects | Corinne Kuyl | Animation |
| Production | Isabelle Truc | Executive In Charge Of Production |
| Visual Effects | Dani Alcaraz | Animation |
| Visual Effects | Vanessa Crahay | Animation |
| Visual Effects | Pieter Vanluffelen | Animation |
| Crew | Emmanuel Delétang | Executive Music Producer |
| Sound | Lance Hogan | Musician |
| Production | Audrey O'Brien | Production Coordinator |
| Art | Maya Merigeau | Background Designer |
| Production | Edit Sándor | Production Manager |
| Art | Jonas Hoffmann | Title Designer |
| Visual Effects | Jeremy Purcell | Animation |
| Visual Effects | Alfredo Cassano | Animation |
| Visual Effects | Lionel Marchand | Animation |
| Visual Effects | Alessandra Sorrentino | Animation |
| Visual Effects | David Bols | Animation |
| Sound | Slim Pezin | Music Supervisor |
| Production | Eric Jacquot | Production Coordinator |
| Production | Eric Goossens | Executive In Charge Of Production |
| Visual Effects | Lorraine Lordan | Animation |
| Visual Effects | Caroline Piochon | Animation |
| Sound | Colm Ó'Snodaigh | Musician |
| Sound | Sébastien Marquilly | Sound Editor |
| Sound | Maxime Lefevre | Sound Engineer |
| Visual Effects | Hermien Verstraete | Animation |
| Production | Ross Murray | Executive In Charge Of Production |
| Sound | Sébastien Cortequisse | Sound Editor |
| Visual Effects | Michele De Feudis | Animation |
| Visual Effects | Eve Guastella | Key Animation |
| Production | Armelle Glorennec | Production Coordinator |
| Production | Anton Roebben | Production Coordinator |
| Visual Effects | Barry Reynolds | Animation |
| Visual Effects | Andrzej Radka | Animation |
| Sound | Slim Pezin | Musician |
| Sound | Rossa Ó'Snodaigh | Musician |
| Crew | Marcos Alessandro da Col | Systems Administrators & Support |
| Crew | Paul Lavergne | Executive Music Producer |
| Visual Effects | Jean-Baptiste Vendamme | Animation |
| Art | Aurélie Bernard | Background Designer |
| Sound | Dee Armstrong | Musician |
| Production | Marcelo Fernandes De Moura | Production Manager |
| Directing | Tomm Moore | Director |
| Writing | Fabrice Ziolkowski | Screenplay |
