 | Dixie Egerickx als Mary Lennox |
 | Tommy Gene Surridge als Billy |
 | Colin Firth als Lord Archibald Craven |
 | Julie Walters als Mrs. Medlock |
 | Maeve Dermody als Alice |
 | Edan Hayhurst als Colin Craven |
 | Amir Wilson als Dickon |
 | Isis Davis als Martha |
 | Richard Hansell als George |
 | David Verrey als Jeremy |
| Lee Starkey als Train Passenger (uncredited) |
 | Sonia Goswami als Aayah |
| Billy Jenkins als Extra (uncredited) |
 | Rupert Young als Marcus |
| Anne Lacey als Mrs. Pitcher |
 | Jemma Powell als Grace |
| Didier Lupfer | Executive Producer |
| David Heyman | Producer |
| Marc Munden | Director |
| Michele Clapton | Costume Design |
| Danny Perkins | Executive Producer |
| Solomon Honey | Assistant Art Director |
| Frances Hodgson Burnett | Novel |
| Liz West | Script Supervisor |
| Nigel Albermaniche | Production Sound Mixer |
| Rosie Alison | Producer |
| Jane Robertson | Co-Producer |
| Dan MacRae | Executive Producer |
| Lol Crawley | Director of Photography |
| Dario Marianelli | Original Music Composer |
| Jack Thorne | Screenplay |
| Karen Lindsay-Stewart | Casting Director |
| Nadia Stacey | Makeup Designer |
| Luke Dunkley | Editor |
| Nadia Stacey | Hair Designer |
| Ron Halpern | Executive Producer |
| Grant Montgomery | Production Design |
| Samantha Denyer | Hair Supervisor |
| Adele Firth | Hair Supervisor |
| Jemma Carballo | Hair Supervisor |
| Anna Morena | Makeup & Hair |
| Christina Baker | Makeup & Hair |
| Adele Firth | Makeup Supervisor |
| Samantha Denyer | Makeup Supervisor |
| Jemma Carballo | Makeup Supervisor |
| Deborah Saban | First Assistant Director |
| Olivia Lloyd | Second Assistant Director |
| Sophie O'Neill | Assistant Costume Designer |
| Giles Gale | Costume Supervisor |
| Ema Richards | Textile Artist |
| Nick Wall | Additional Still Photographer |
| Tom Wilkinson | Camera Operator |
| Derrick Peters | Camera Operator |
| Georgia Quilliam | Data Wrangler |
| Mark Kozlowski | Digital Imaging Technician |
| Steve Quan | Drone Cinematographer |
| Ben Platts | Drone Operator |
| Westley Agius | Electrician |
| Richard Harrowing | Electrician |
| William Sheffield | Electrician |
| Billy Thornhill Jr. | Electrician |
| Greg Whitbrook | Electrician |
| James Baudouy | Epk Camera Operator |
| Tae Mawson | Epk Producer |
| John Watters | First Assistant Camera |
| Paul Dain | First Assistant Camera |
| Ray Meere | First Assistant Camera |
| Jonny Franklin | Gaffer |
| Mark Joiner | Generator Operator |
| Davey Mayes | Generator Operator |
| Charlie Wyldeck-Flowers | Key Grip |
| Terry Williams | Key Grip |
| Jack Farrow | Lighting Technician |
| Anthony Goulding | Rigging Gaffer |
| Elliot Dupuy | Second Assistant Camera |
| Tom Wilkinson | Steadicam Operator |
| Henry Landgrebe | Steadicam Operator |
| Parisa Taghizadeh | Still Photographer |
| Matt Curtis | Title Designer |
| Darren Miller | Aerial Camera |
| Emily Jacobs | Casting Associate |
| Maxx Wai In Leong | CG Supervisor |
| David Sheldon | Compositor |
| Brooke McGowan | Compositor |
| Hadrien Malinjod | Compositor |
| Penn Stevens | Creature Effects Technical Director |
| Adam Glasman | Digital Colorist |
| Peter Dudley | Digital Compositor |
| Cyrille Gohier | Digital Compositor |
| Yusuf Hasan | Digital Compositor |
| Chieka Ononye | Digital Compositor |
| Luca Serafini | Digital Compositor |
| Chris Berry | Digital Compositor |
| Andrew Pinson | Digital Compositor |
| Joel Savage | Modeling |
| David Walker | Modeling |
| Luke Wilding | Modeling |
| Nicholas Hampshire | Pipeline Technical Director |
| Marc-Olivier Rouleau | Pipeline Technical Director |
| Tonya Strantzi | Pipeline Technical Director |
| Marco Lee | VFX Artist |
| Kailas Huljute | Visual Effects |
| Georgia Cook | Visual Effects Coordinator |
| Rachel Elfassy-Bitoun | Visual Effects Coordinator |
| Gavin Gregory | Visual Effects Producer |
| Rupert Smith | Visual Effects Producer |
| Adela Popescu | Visual Effects Production Assistant |
| Andy Kind | Visual Effects Supervisor |
| Rob Rowley | Special Effects Supervisor |
| Simon Diggins | ADR Mixer |
| Gibran Farrah | ADR Mixer |
| Mike Tehrani | ADR Mixer |
| Lottie Wade | ADR Recordist |
| Christopher Atkinson | Boom Operator |
| Oliver Ferris | Foley Artist |
| Sue Harding | Foley Artist |
| Hugo Adams | Foley Editor |
| Adam Mendez | Foley Mixer |
| Jens Rosenlund Petersen | Sound Designer |
| Conor Kelly | Sound Mix Technician |
| Candela Palencia | Sound Mix Technician |
| Andrew Stirk | Sound Re-Recording Mixer |
| Andy Shelley | Supervising Sound Editor |
| Alastair Sirkett | Supervising Sound Editor |
| Gareth Palethorpe | Art Department Assistant |
| Sarah Ruiz Del Vizo | Art Department Assistant |
| Clare Griffiths | Art Department Coordinator |
| Luke Anstiss | Dressing Prop |
| Jason Vakharia | Dressing Prop |
| Daniel Woodard | Dressing Prop |
| Manuel Vilaseca Vaya | Dressing Prop |
| Louise Begbie | Graphic Designer |
| Noel Cowell | Property Master |
| Jean-Claude Allen | Props |
| Ian Griffin | Set Dresser |
| Douglas Ingram | Storyboard Artist |
| Temple Clark | Storyboard Artist |
| Pilar Foy | Supervising Art Director |
| Richard May | Production Manager |
| Laura Marion James | Animation |
| Ollie Thomas | Animation |
| Adam Ward | Animation |
| Cynthia Crimmins | Animation Manager |
| Adam Shell | Colorist |
| Alexander Phillips | Digital Intermediate Assistant |
| Rob Farris | Digital Intermediate |
| Lawrence Hook | Digital Intermediate |
| Jonathan Collard | Digital Intermediate |
| Emanuele Giraldo | First Assistant Editor |
| Chloe Warner-Harris | Online Editor |
| Ben Mills | VFX Editor |
| Jenni Lewis | Location Manager |
| Matthew Bowden | Location Manager |
| Lucy Morris | Location Coordinator |
| Ranjana Mitra | Chaperone |
| Anita Primett | Chaperone |
| Isobel Richards | Chaperone |
| Nick Trumble | Dialect Coach |
| David Danisovszky | Payroll Accountant |
| Liam Fitzpatrick | Production Assistant |
| Giulia Simone | Production Assistant |
| Catherine Booton | Production Coordinator |
| Paul Smith | Production Secretary |
| Lara Cornell | Set Production Assistant |
| Tamlyn Samuels | Travel Coordinator |
| Symon Butcher | Transportation Captain |
