 | Tom Holland als The Novice - Brother Diarmuid |
 | Richard Armitage als Raymond De Merville |
 | Jon Bernthal als The Mute |
 | Stanley Weber als The Cistercian - Brother Gerladus |
 | John Lynch als The Herbalist - Brother Ciaran |
 | Eric Godon als Baron de Merville |
 | Tristan McConnell als Dugald |
 | Rúaidhrí Conroy als Brother Rua |
 | Lochlann O'Mearáin als Lopsided |
 | Hugh O'Conor als Brother Cathal |
 | Nikos Karathanos als Saint Matthias |
| Brendan Muldowney | Director |
| Aram Tertzakian | Executive Producer |
| Conor Barry | Producer |
| Dan Hubbard | Casting |
| Jamie Hannigan | Writer |
| John Keville | Producer |
| Benoît Roland | Producer |
| Nick Spicer | Executive Producer |
| Mairéad McIvor | Editor |
| Charlie Endean | First Assistant Director |
| Sophie Higel | Second Assistant Director |
| Tom Comerford | Director of Photography |
| Owen Power | Production Design |
| Stephen McKeon | Original Music Composer |
| Marc Ridremont | Art Direction |
| Philippe Charbonnel | Sound Re-Recording Mixer |
| Cora Debain | Makeup Artist |
| Dara Hand | Set Decoration |
| Leonie Prendergast | Costume Design |
| Alexandra Brixy | Underwater Camera |
| Laurent Van Eijs | Gaffer |
| Alexandre Rouil | Visual Effects Supervisor |
| Linda Gannon | Key Hair Stylist |
| Aurélien Bihr | Construction Coordinator |
| Yiannis Maragoudakis | Gaffer |
| Joachim Philippe | Camera Operator |
| Micheal O'Mogáin | Gaffer |
| Thibaud Rie | Sound Recordist |
| Gaël Durant | Visual Effects Producer |
| Yves Renard | Sound Effects Editor |
| John Hand | Art Direction |
| Kris Dewitte | Still Photographer |
| Steven Templeton | Special Effects Coordinator |
| Marie Brabant | Key Makeup Artist |
| Beatrice Cormann | Makeup Artist |
| Stéphanie Deven | Makeup Artist |
| Benjamin Speyer | Key Grip |
| Elsa Ruhlmann | Boom Operator |
| Catherine Tilman | Makeup Artist |
