 | Madison Wolfe als Barbara Thorson |
 | Zoe Saldaña als Mrs. Mollé |
 | Imogen Poots als Karen Thorson |
 | Sydney Wade als Sophia |
 | Rory Jackson als Taylor |
 | Art Parkinson als Dave |
 | Noel Clarke als Mr. Mollé |
 | Jennifer Ehle als Mrs. Thorson |
 | Ciara O'Callaghan als Theresa Tuzzo |
 | John Boyle als Giant (voice) |
 | Brandon Maher als Jock |
 | Don Wycherley als Principal Marx |
| Amanda Stuart als School aide |
| Aideen Wylde als Mrs. Potts |
 | Ben Carolan als Mophead |
| Sonya Kelly als Mrs. Laney |
| Anders Walter | Director |
| Joe Kelly | Screenplay |
| Laurent Perez del Mar | Original Music Composer |
| Lars Wissing | Editor |
| Susie Cullen | Production Design |
| Rasmus Heise | Director of Photography |
| Evie Hamels | Key Makeup Artist |
| Frank van Wolleghem | Key Hair Stylist |
| Saskia Verreycken | Prosthetic Designer |
| Charlotte Willems | Costume Design |
| Stijn Guillaume | Set Decoration |
| Gilles Balabaud | Art Direction |
| Tamara Conboy | Art Direction |
| Mick Flood | Property Master |
| Pieter Maesschalck | Set Dresser |
| Hans Reynaerts | Key Grip |
| Jonathan Vandrepotte | Animation |
| Maxim Honoré | Lighting Technician |
| Jelle Ector | Techno Crane Operator |
| Cécile Coutelier | Music Editor |
| Ken Van De Mierop | Set Dresser |
| Jeroen Truijens | Dialogue Editor |
| Alek Goosse | Sound Re-Recording Mixer |
| Guillaume Lurati | Animation |
| Augustin Paliard | Animation |
| Aurore Rousset | CG Supervisor |
| François Dumont | Supervising Sound Editor |
| Phillip Berg | Animation Director |
| Hoefkens Klaas | Set Dresser |
| Chris De Strycker | Boom Operator |
| Thomas Vanthuyne | Visual Effects Editor |
| Kaisa Mielczarek | Seamstress |
| Thyrza Ging | Casting |
| Michèle Meire | Art Department Coordinator |
| Martin Metz | Producer |
| Eimear Ennis-Graham | Lighting Technician |
| Leen Verhelst | Casting |
| Alice Merlin | Casting Associate |
| Jan Van Den Bussche | Draughtsman |
| Bart van Otterdijk | Camera Operator |
| Barbara J. McCarthy | Producer |
| Jean-Marc Ky | Animation |
| Addo Gallagher | Gaffer |
| Barbara de Laere | Seamstress |
| Michael Barnathan | Producer |
| Steve Jackson | Sound Recordist |
| Mattijs Van Doninck | Lighting Technician |
| Joe Kelly | Producer |
| Adrian Politowski | Producer |
| Hannes Blommaert | Epk Camera Operator |
| Wouter Dewilde | First Assistant Camera |
| Vincent Maloumian | Foley |
| Dieter Van der Eecken | Gaffer |
| Nick Spicer | Producer |
| Kyle Franke | Producer |
| Louise Kiely | Casting |
| Olivier Paternoster | Animation |
| Chris Piccaro | Music Supervisor |
| Kim Bells | Set Dresser |
| Kevin Van Roy | Script Supervisor |
| Chris Columbus | Producer |
| Kim Magnusson | Producer |
| Martin Hayes | Construction Coordinator |
| Julia Reijman | Property Master |
| Korneel Moeyaert | Electrician |
| Sofie Silbermann | Still Photographer |
| Louis Bülov Bertelsen | Assistant Editor |
| Thomas Vanthuyne | Assistant Editor |
| J.M. Ken Niimura | Graphic Novel |
| Joe Kelly | Graphic Novel |
