 | Letitia Wright als June Gibbons |
 | Tamara Lawrance als Jennifer Gibbons |
 | Jack Bandeira als Wayne |
 | Jordan J Gallagher als Ron |
 | Tony Richardson als Dr. John Rees |
 | Leah Mondesir-Simmonds als Young June Gibbons |
| Eva-Arianna Baxter als Young Jennifer Gibbons |
 | Nadine Marshall als Gloria Gibbons |
 | Treva Etienne als Aubrey Gibbons |
 | Michael Smiley als Tim Thomas |
 | Jodhi May als Marjorie Wallace |
 | Amarah-Jae St. Aubyn als Greta Gibbons |
 | Kinga Preis als Sister Nowak |
| Dafydd Wyn Roberts als Headmaster Davis |
| John Edmondson als Dr. Davies |
 | Ben Moor als Dr. Hamilton |
 | Miles Jupp als Dr. Le Couteur |
 | Natalia Sikora als patient |
 | Przemysław Przestrzelski |
| Agnieszka Smoczyńska | Director |
| Marjorie Wallace | Book |
| Ben Pugh | Producer |
| Andrea Seigel | Executive Producer |
| Klaudia Śmieja-Rostworowska | Producer |
| Anita Gou | Producer |
| Charlie Morrison | Executive Producer |
| Joshua Horsfield | Producer |
| Kharmel Cochrane | Casting |
| Siobhan Boyes | Post Production Supervisor |
| Sian Crisp | Casting Assistant |
| Hazel Holder | Dialect Coach |
| Alicia Van Couvering | Producer |
| Katie Anderson | Executive Producer |
| Trevor Groth | Executive Producer |
| Jake Carter | Executive Producer |
| Beata Rzezniczek | Executive Producer |
| Tamara Lawrance | Executive Producer |
| Marjorie Wallace | Executive Producer |
| Michael Reuter | Executive Producer |
| Sebastian Barker | Executive Producer |
| Letitia Wright | Producer |
| Marcin Macuk | Original Music Composer |
| Zuzanna Wronska | Original Music Composer |
| Jakub Kijowski | Director of Photography |
| Żywia Kosińska | Casting |
| Jagna Dobesz | Production Design |
| Anna Mocny | Art Direction |
| Kinga Babczyńska | Set Decoration |
| Katarzyna Lewińska | Costume Design |
| Cobbie Yates | Co-Costume Designer |
| Katarzyna Smoter | Costume Supervisor |
| Magdalena Bester | Costume Supervisor |
| Tomasz Karnowski | Steadicam Operator |
| Adam Mendry | Steadicam Operator |
| Giulia Solia | Visual Effects Producer |
| Jakub Knapik | Visual Effects Supervisor |
| Jean-Michel Boublil | Visual Effects Supervisor |
| Jarosław Golec | Stunt Coordinator |
| Michal Krzyżkowiak | Stunts |
| Maria Chilarecka | Sound Recordist |
| Michał Fojcik | Sound Effects Editor |
| Matthias Schwab | Sound Re-Recording Mixer |
| Joanna Bochenska | Makeup Artist |
| Anna Dąbrowska | Makeup Artist |
| Pola Guźlińska | Makeup Artist |
| Błażej Pintara | Hairstylist |
| Peter Bernaers | Colorist |
| Agnieszka Glińska | Editor |
| Ewa Puszczyńska | Producer |
| Andrea Seigel | Screenplay |
