 | Kristen Stewart als Princess Diana |
 | Timothy Spall als Major Alistair Gregorys |
 | Jack Nielen als William |
 | Freddie Spry als Harry |
 | Jack Farthing als Prince Charles |
 | Sean Harris als Darren |
 | Stella Gonet als The Queen |
 | Richard Sammel als Prince Philip |
 | Elizabeth Berrington als Princess Anne |
 | Lore Stefanek als Queen Mother |
 | Amy Manson als Anne Boleyn |
 | Sally Hawkins als Maggie |
 | James Harkness als Footman Paul |
 | Laura Benson als Angela (Dresser) |
 | Wendy Patterson als Maria (Older Maid) |
 | Libby Rodliffe als Pamela (Maid) |
 | John Keogh als Michael (Charles' Valet) |
 | Marianne Graffam als Barbara (Nanny) |
 | Ben Plunkett-Reynolds als Footman Brian |
 | Ryan Wichert als Staff Sergeant Wood |
 | Michael Epp als Lance Corporal Jacobs |
 | Tom Hudson als Police Constable Thomas |
 | James Gerard als Police Constable Field |
 | Thomas Douglas als John Spencer |
 | Ian Ashpitel als Vicar |
| Emma Darwall Smith als Camilla Parker Bowles |
| Kimia Schmidt als Diana (9 Years) |
| Greta Bücker als Diana (Late Teenage Years) |
| Henry Castello als Charles Spencer (9 Years) |
| Christin Schreiber als Alter Ego Diana |
 | Camille Loup Moltzen als Boy (Roadhouse Cafe) |
| Mudassar Dar als KFC Employee |
 | Niklas Kohrt als Prince Andrew |
| Peter Lee als Church Organist |
| Olga Hellsing als Sarah Ferguson (uncredited) |
| Matthias Wolkowski als Prince Edward (uncredited) |
 | Oriana Gordon als Lady Sarah Chatto (uncredited) |
| Sami Amber als Boy (Roadhouse Cafe) (uncredited) |
| Pablo Larraín | Director |
| Pablo Larraín | Producer |
| Jonas Dornbach | Producer |
| Janine Jackowski | Producer |
| Juan de Dios Larraín | Producer |
| Paul Webster | Producer |
| Jacqueline Durran | Costume Design |
| Guy Hendrix Dyas | Production Design |
| Jonny Greenwood | Original Music Composer |
| Claire Mathon | Director of Photography |
| Tom Quinn | Executive Producer |
| Jeff Deutchman | Executive Producer |
| Christina Zisa | Executive Producer |
| Michael Bloom | Executive Producer |
| Maria Zuckerman | Executive Producer |
| Ryan Heller | Executive Producer |
| Amy Hubbard | Casting |
| Ralf Schreck | Supervising Art Director |
| Stefan Speth | Art Direction |
| Yeşim Zolan | Set Decoration |
| Stacey Panepinto | Makeup Artist |
| Tristan Hume | Production Supervisor |
| Mathias Datow | Assistant Director |
| Gregor Stitzl | First Assistant Director |
| Henning Brehm | Graphic Designer |
| Enzo Enzel | Scenic Artist |
| Friederike Gast | Assistant Set Decoration |
| Anna Jarocka | Assistant Art Director |
| Sebastián Sepúlveda | Editor |
| Sebastian Barker | Visual Effects Supervisor |
| Vikram Chadha | Visual Effects Producer |
| Miguel Hormazábal | Sound Designer |
| Mauricio López | Sound Re-Recording Mixer |
| Steven Knight | Executive Producer |
| Ben von Dobeneck | Executive Producer |
| Sarah Nagel | Executive Producer |
| Isabell Wiegand | Executive Producer |
| Maren Ade | Producer |
| Robin Plöger | Set Dresser |
| Adele Fletcher | ADR Editor |
| Roman Höffgen | Boom Operator |
| Jörg Kidrowski | Production Sound Mixer |
| Ivo Moraga | Foley Supervisor |
| Ivo Moraga | Foley Artist |
| Soledad Vargas | Foley Recordist |
| Lou Datchens | Visual Effects Coordinator |
| Iris Paschedag | Assistant Art Director |
| Kim Scharnitzky | Set Decoration Buyer |
| Paddy Eason | Visual Effects Supervisor |
| Emily Bowen | Assistant Costume Designer |
| Steven Knight | Writer |
| Tanja Adams | Makeup & Hair |
| Britta Balcke | Makeup & Hair |
| Stefanie Baumann | Makeup & Hair |
| Lena Brendle | Makeup & Hair |
| Chris Cole | Makeup & Hair |
| Heike Ersfeld | Makeup & Hair |
| Nicola Iles | Makeup & Hair |
| Sandra Kaczmarek | Makeup & Hair |
| Charlotte Lander | Makeup & Hair |
| Beate Prein | Makeup & Hair |
| Annett Schulze | Makeup & Hair |
| Friederike Schäfer | Makeup & Hair |
| Wakana Yoshihara | Hair Designer |
| Wakana Yoshihara | Makeup Designer |
| Francesca Brooks | Script Supervisor |
| Gabriele Mattner | Script Supervisor |
| Laura Ritter | Script Supervisor |
| Andrew Hevia | Associate Producer |
| Hannah Spreitzenbarth | Stunt Double |
| Ernesto Giolitti | Gaffer |
| Diego Miranda | Steadicam Operator |
| Bastian Hopfgarten | VFX Supervisor |
