 | Noah Schnapp als Jo |
 | Thomas Kretschmann als Korporal |
 | Frederick Schmidt als Benjamin |
 | Tómas Lemarquis als Leutnant |
 | Gilles Marini als Papa |
 | Elsa Zylberstein als Maman |
 | Joséphine de la Baume als Madame |
 | Sadie Frost als Madame Jollet |
 | Jean Reno als Henri |
 | Urs Rechn als Hans |
 | Anjelica Huston als Horcada |
 | Declan Cole als Hubert |
| Enola Izquierdo Cicuendez als Leah |
| Amandine Rose als Christine |
| Mathys Gallet-Lartigue als Lukas |
| Laurent Pedebernard als Monsieur Jollet |
 | Jean-François Balmer als Narrator |
| Dolma Raisson als Anya |
 | Raj Awasti als Soldier |
| Kevin Kain als The Fat and Stupid Man |
 | Lukas Sauer als Hans |
| Sylvain Bressolles als Passerby |
| Patrice Yan als Soldier |
| Michael Morpurgo als Farmer |
| Steffen Wild als Soldier |
| Alan Latham als Soldier |
| Paul Stephenson als Soldier |
 | William Abadie als Father Lasalle |
 | Nicholas Rowe als Monsuier Sarthol |
| Ben Cookson | Director |
| Ben Cookson | Writer |
| Shannon Makhanian | Casting |
| Toby Torlesse | Writer |
| Michael Morpurgo | Novel |
| Phin Glynn | Producer |
| Alan Latham | Producer |
| Philippe Cabrie | Art Direction |
| Laurence Brenguier | Production Design |
| Philippe Cabrie | Set Decoration |
| Jacq Eric | Set Decoration |
| Gerry Vasbenter | Director of Photography |
| Chris Gill | Editor |
| Agnès Noden | Costume Design |
| Paul Olivier | Graphic Designer |
| Helen Chesworth | Makeup Artist |
| Abi Lilley | Makeup Artist |
| Frances Hounsom | Makeup Designer |
| Sarah Jane Marks | Makeup Supervisor |
| Lindy Gander | Assistant Costume Designer |
| Camille Ballouhey | Set Costumer |
| Claire Bleasdale | Casting Associate |
| Nathalie Camidebach | Extras Casting |
| Denis Antheunissens | Electrician |
| Kevin Kain | Electrician |
| Nicolas Dufay | Electrician |
| Dora Krolikowska | First Assistant "A" Camera |
| Clare Connor | First Assistant "B" Camera |
| Antony Allen | Gaffer |
| Rebecca Horsburgh | Key Grip |
| Gauthier Berlaimont | Lighting Technician |
| Edwin Van Den Hove | Rigging Grip |
| Clare Seymour | Second Assistant "A" Camera |
| Ben Gadsden | Second Assistant "B" Camera |
| Paul Stephenson | Still Photographer |
| Nick Baldock | ADR Mixer |
| Greg Crawford | ADR Mixer |
| Josh Heilbronner | ADR Mixer |
| Adrian Furdui | ADR Supervisor |
| Thomas Holroyd | Assistant Sound Editor |
| Marek Forreiter | Dialogue Editor |
| Vincent Maloumian | Foley Artist |
| Patrick Singer | Foley Artist |
| Kristiana Udre | Foley Artist |
| James Matthews | Foley Editor |
| Tanay Nambiar | Foley Mixer |
| Aris Anastassopoulos | Production Sound Mixer |
| Kian McClure | Sound Assistant |
| Rory Hammond | Sound Assistant |
| Simon Gershon | Sound Designer |
| Olivia Celeste Barry | Sound Editor |
| Jonathan Smith | Sound Effects Editor |
| Ben Carr | Sound Re-Recording Mixer |
| Peter Baldock | Supervising Sound Editor |
| Tim Gathercole | CG Artist |
| Andrew Jones | CG Supervisor |
| Ari Levinson | Visual Effects Supervisor |
| Ben Louden | Visual Effects Supervisor |
| Nina Haditalab | Assistant Editor |
| Matthew Wingad | Assistant Editor |
| Adam Shell | Colorist |
| Nigel Bunyan | First Assistant Editor |
| Bertrand Conard | First Assistant Editor |
| Susumu Asano | Online Editor |
| Charles E. Savage | Script Editor |
| Nua Watford | Script Supervisor |
| Rebecca Gausnell | Dialect Coach |
| Patrick Gillespie | Floor Runner |
| Emmanuelle Balestrieri | Production Accountant |
| Nancy Bressolles | Production Coordinator |
| Jessica Phelps | Studio Teacher |
| James Seymour Brett | Original Music Composer |
| Tannaz Anisi | Executive Producer |
| Gregory R. Schenz | Executive Producer |
| Ross Marian | Associate Producer |
