- Nora Twomeyco-director
- Tomm Mooreoriginal story
- Fabrice Ziolkowskiscreenplay
- Evan McGuire(voice) (as Evan Mc Guire)
- Mick Lally(voice)
- Paul Tylak(voice) (as Paul Tylac)
- Conor O'Halloran(voice) (as Conor O Halloran)
- Jonas Till Hoffmann(voice) (as Jonas Hoffmann)
- James O'Halloran(voice) (as James O Halloran)
- Fabian Erlinghauser(voice) (as Fabian Erlinghäuser)
- Didier Brunnerproducer: Les Armateurs
- James Flynnexecutive producer: Cartoon Saloon
- Tomm Mooreco-producer: Cartoon Saloon
- Ivan Rouveureexecutive producer
- Viviane Vanfleterenexecutive producer: Vivi Film / producer: Vivi Film
- Paul Youngproducer: Cartoon Saloon
- Katia Besimenskyhead of production
- Marcelo Fernandes De Mouraproduction manager: Lightstar Studios (as Marcelo Fernandes de Moura)
- Camille Leganzaexecutive in charge of production
- Edit Sándorproduction manager: Kecskemet Film
- Rémi Chayéfirst assistant director
- Lily Bernardprops designer / scene illustrator
- Tomm Moorevisual development
- Sebastien Cortequissesound editor (as Sébastien Cortequisse)
- Fabien Devillersre-recording mixer
- Alexandre Fleurantsound editor
- Davy Hollandadditional voice recordist
- Sébastien Marquillysound designer / sound editor
- Piste Rougeexecutive sound producer
- Raphaël Seydouxadr recordist
- Bruno Seznecsound supervisor
- Christine Seznecvoice recording supervisor
- Lydie Tedescoadministration: Piste Rouge
- John Dunnetrainee: A Man & Ink
- Helen Ilustrainee: A Man & Ink
- Lorraine Lordananimator: A Man & Ink
- Jeremy Purcellanimator: A Man & Ink / head of effects
- Pierre Cambierdigital compositor (uncredited)
- Thibault Pierrevisual effects artist (uncredited)
- Dani Alcarazanimator: Walking The Dog
- Bille Storm Andersenlayout artist: Cartoon Saloon (as Niklas Andersen)
- Gabriella Andrássyclean up inbetweens: Kecskemet Film
- Karen Bagonneauexport background: Blue Spirit Studio
- Krisztina Bakosclean up inbetweens: Kecskemet Film
- László Balajthyrough animator: Kecskemet Film
- Katia Bartholoméink and paint junior team: Digital Graphics Studio
- Tibor Beckclean up inbetweens: Kecskemet Film
- Darko Belevskianimation supervisor: Kecskemet Film
- Joris Bergmanstrainee: Walking The Dog
- Kairen Walochcasting coordinator
- Chrystèle Barbaratdigital post-production: Mikros Image
- Jean-Baptiste Le Guendigital post-production: Mikros Image
- Mathieu Leclercqdigital post-production: Mikros Image
- Daniel Pereirafilm laboratory: Arane Gulliver
- Luc Pourrinetfilm laboratory: Arane Gulliver
- Joseph Fitzpatrickeditorial advisor (uncredited)
- Els Verhaegheassistant post-production (uncredited)
- Dee Armstrongmusician: violin
- Jean-Philippe Audinmusician: cello
- Corinne Bahuauxchoir member
- Cédric Baillergeauchoir member
- Nicolas Bercetchoir member
- Marion Delcourtchoir member
- Emmanuel Deletangexecutive music producer (as Emmanuel Delétang)
- Lucille Delvauxchoir member
- Eoin Dillonmusician: uilleann pipes
- Lance Hoganmusician: percussions
- Guy Andriestax manager: Kinepolis Group
- Mathieu Bardouassistant to head of legal affairs: Les Armateurs
- Nicolas Bollandsoftware assistant: Digital Graphics Studio
- Mireille Cimenthead of development: Les Armateurs
- Serge Colibertadministrative: Les Armateurs
- Jean-Paul Comminin charge of promotion: Les Armateurs (as Jean Paul Commin)
- Herman Crouxlegal advisor: Marx, Van Ranst, Vermeersch & Partners, Vivi Film
- Marcos Alessandro da Colsystem administrator: Lightstar
- Delphine Dalquiéhead of legal affairs: Les Armateurs
- Vasti Fernandes Siqueira de Souzaproduction assistant: Lightstar
- Marc Bonnyspecial thanks: Gebeka Films
- Ciara Breslinspecial thanks
- Helen Bronaghspecial thanks
- Roxanne Burchartzspecial thanks
- Iris Cadouxspecial thanks
- Sarah Carmodyspecial thanks
- Eleni Chandrinouspecial thanks
Crew believed to be complete
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