 | Gary Oldman als Winston Churchill |
 | Kristin Scott Thomas als Clemmie |
 | Ben Mendelsohn als King George VI |
 | Lily James als Elizabeth Layton |
 | Ronald Pickup als Neville Chamberlain |
 | Stephen Dillane als Viscount Halifax |
 | Nicholas Jones als Sir John Simon |
 | Samuel West als Sir Anthony Eden |
 | David Schofield als Clement Atlee |
 | Richard Lumsden als General Ismay |
 | Malcolm Storry als General Ironside |
 | Hilton McRae als Arthur Greenwood |
 | Benjamin Whitrow als Sir Samuel Hoare |
 | Joe Armstrong als John Evans |
 | Adrian Rawlins als Air Chief Marshal Dowding |
 | David Bamber als Admiral Ramsay |
 | Paul Leonard als Admiral Dudley Pound |
 | David Strathairn als President Roosevelt (voice) |
 | Eric MacLennan als Tom Leonard |
 | Philip Martin Brown als Sawyers |
 | Demetri Goritsas als Cabinet Secretary Bridges |
 | Jordan Waller als Randolph Churchill |
 | Alex Clatworthy als Diana Churchill |
 | Mary Antony als Mary Churchill |
 | Bethany Muir als Sarah Churchill |
 | Anna Burnett als Pamela Churchill |
 | Jeremy Child als Lord Stanhope |
 | Brian Pettifer als Lord Kingsley Wood |
 | Michael Gould als Lord Londonderry |
 | Paul Ridley als House of Commons Speaker |
 | Robin Pearce als Ernle Hastings |
 | Michael Bott als Equerry |
 | Olivier Broche als Reynaud |
 | Mario Hacquard als Daladier |
 | Pip Torrens als BBC Producer |
| Edmund Wiseman als Actor |
 | Hannah Steele als Abigail Walker |
 | Nia Gwynne als Alice Simpson |
| Ade Dee Haastrup als Marcus Peters |
 | James Eeles als Maurice Baker |
 | Flora Nicholson als Jessie Sutton |
 | Bronte Carmichael als Young Girl on Tube |
 | Roisin O'Neill als Agnes Dillon |
 | John Locke als Oliver Wilson |
| Joanna Neary als Margaret Jerome |
 | Richard Glover als Brigadier Nicholson |
 | Tom Ashley als Ramsay Staffer |
 | Joshua Higgott als Reporter |
 | Imogen King als Teenage Girl at Tube Map |
| Miles Gallant als Naval Map-Room Officer |
 | Faye Marsay als Sybil |
 | John Atterbury als Sir Alexander Cadogan |
 | James Harkness als AD Nicholl (Secretary #1) |
 | Joshua James als W D Wilkinson (Secretary #2) |
 | Charley Palmer Rothwell als Christopher Wilson (Photographer) |
 | Patsy Ferran als Maid |
 | Sarah Flind als Cook |
| Steffan Donnelly als Back Bencher |
| Kieran Buckeridge als Cecil Beaton |
 | Johnny Otto als Member of Parliament (uncredited) |
| Joe Wright | Director |
| Anthony McCarten | Screenplay |
| Tim Bevan | Producer |
| James Biddle | Executive Producer |
| Lisa Bruce | Producer |
| Eric Fellner | Producer |
| Anthony McCarten | Producer |
| Douglas Urbanski | Producer |
| Dario Marianelli | Music |
| Valerio Bonelli | Editor |
| Jina Jay | Casting |
| Sarah Greenwood | Production Design |
| Oliver Goodier | Art Direction |
| Nick Gottschalk | Supervising Art Director |
| Joe Howard | Art Direction |
| Katie Spencer | Set Decoration |
| Jacqueline Durran | Costume Design |
| Flora Moody | Key Makeup Artist |
| Flora Moody | Key Hair Stylist |
| Ivana Primorac | Hair Designer |
| Louis Phillips | Executive In Charge Of Production |
| Jo Wallett | Production Manager |
| Dan Channing-Williams | First Assistant Director |
| Gayle Dickie | Second Assistant Director |
| Alex Abelman | Carpenter |
| Marie Boon | Art Department Assistant |
| James Collins | Draughtsman |
| Lottie Geliot | Art Department Assistant |
| Stephanie Gibbins | Construction Coordinator |
| Julia Newell | Construction Coordinator |
| Josh O'Neill | Carpenter |
| Roberto Oliveri | Set Dresser |
| Isona Rigau | Assistant Art Director |
| Matt Robinson | Assistant Art Director |
| Matt Robinson | Assistant Art Director |
| Robert Sansom | Carpenter |
| Dennis Wiseman | Property Master |
| John Casali | Production Sound Mixer |
| Chris Murphy | Boom Operator |
| Kazu Hiro | Prosthetic Makeup Artist |
| Kazu Hiro | Hair Designer |
| Lucy Sibbick | Prosthetic Makeup Artist |
| Patricia Leblanc | Visual Effects Coordinator |
| Christopher Collis | Visual Effects Editor |
| Warwick Hewett | Visual Effects Producer |
| Bruno Delbonnel | Director of Photography |
| Des Whelan | Camera Operator |
| Jeremy Braben | Aerial Director of Photography |
| Carlos De Carvalho | Second Unit Director of Photography |
| Chuck Finch | Gaffer |
| Jack Ridout | Lighting Technician |
| Dave Clements | Electrician |
| Jessie Frost | Casting Associate |
| Andrea Cripps | Assistant Costume Designer |
| Claire Watson | Costume Coordinator |
| Sophie Hart-Walsh | Set Costumer |
| Tommaso Gallone | First Assistant Editor |
| Jon Baker | Armorer |
| Phoebe Billington | Script Supervisor |
| Sam Dormer | Armorer |
| Ben Rothwell | Armory Coordinator |
| Faujja Singh | Armorer |
| Mike Woodley | Aerial Coordinator |
| Michael Maroussas | Dialogue Editor |
| Rob Turner | Foley Editor |
| Paul Carter | Sound Designer |
| Craig Berkey | Sound Re-Recording Mixer |
| Paul Cotterell | Sound Re-Recording Mixer |
| Becki Ponting | Supervising Sound Editor |
| Craig Berkey | Supervising Sound Editor |
| David Malinowski | Prosthetic Makeup Artist |
| Christine Whitney | Hair Supervisor |
| Christine Whitney | Makeup Supervisor |
| Bob Kretschmer | Wigmaker |
| Diana Choi | Wigmaker |
| Tamara Catlin-Birch | Art Department Coordinator |
| Tamara Catlin-Birch | Set Decorating Coordinator |
| Steven Morris | Assistant Property Master |
| Georgina Millett | Graphic Designer |
| James Collins | Set Designer |
| Alex Jadfard | Digital Compositor |
| Gudjon Kristjansson | Digital Compositor |
| Tracie Donais | Digital Compositor |
| Kyle Greenberg | Digital Compositor |
| Alexander Isaksson | Matte Painter |
| Morgan Lang | Matte Painter |
| Laurence Provost | Matte Painter |
| Anne-Marie Ouellet | Visual Effects Production Assistant |
| Jack English | Still Photographer |
| Julian Bucknall | First Assistant "A" Camera |
| Paul Hymns | Key Grip |
| Andrew Jones | Second Assistant "B" Camera |
| Alan Perrin | Drone Pilot |
| Dave Wells | Best Boy Grip |
| Paul Wheeldon | First Assistant "B" Camera |
| Tim Grover | Post Production Supervisor |
| Jamie Edgell | Stunt Coordinator |
| Andrew Burford | Stunts |
| Cristian Knight | Stunts |
| Nick Roeten | Stunts |
| Aaron Hartley | Second Assistant Director |
| Sarah Mooney | Second Assistant Director |
| Tom Edmondson | Second Unit First Assistant Director |
| Thomas Napper | Second Unit Director |
| Netty Chapman | Assistant Set Decoration |
| Carl Alsop | Carpenter |
| Zak Brogan | Carpenter |
| Chris Brough | Carpenter |
| Grant Cort | Carpenter |
| Gavin Hosler | Carpenter |
| Peter 'PJ' Newman | Carpenter |
| Terence Harrington | Dressing Prop |
| Thomas Moriarty | Dressing Prop |
| Mark Jones | Dressing Prop |
| Charlie Summerville | Dressing Prop |
| Jamie Davies-Evans | Painter |
| Paul Gunner | Painter |
| Karl Koroscik | Props |
| Dean Morris | Props |
| Dale Walters | Props |
| Emma MacDevitt | Standby Art Director |
| Matthew Bailey | Standby Carpenter |
| Simon Hutchings | Standby Painter |
| Joel Christopher | Costume Assistant |
| Bonnie Radcliffe | Costume Assistant |
| Hayley Clair Stewart | Costume Assistant |
| John Usher | Costume Assistant |
| Geo Pavlov | Costume Illustrator |
| Vanessa Baker | ADR Voice Casting |
| Rachel Desmarest | Additional Casting |
| Alice O'Donoghue | Casting Assistant |
| Adam Penny | Extras Casting |
| Charlie Rotheram | Extras Casting |
| Elliot Wood | Extras Casting |
| Maikel Popic | Dailies Operator |
| Cherri Arpino | Dailies Manager |
| Jenny-Jayne Webb | Digital Intermediate Editor |
| Charlotte Llewelyn | Digital Intermediate Producer |
| Matt Adams | Digital Intermediate |
| Ian Creed | Marine Coordinator |
| Rebecca Cronshey | Researcher |
| Giles Dumper | Pilot |
| Tom Hingston | Title Designer |
| Tiffany Tiesiera | Production Executive |
| Sanjay Sharma | Production Executive |
| Tanya Mellotte | Payroll Accountant |
| Katy Lawrence | Production Secretary |
| Samuel Harman | Production Secretary |
| Daniel Budd | Production Accountant |
| Jeff Gomillion | ADR Mixer |
| Mark Appleby | ADR Mixer |
| Oskar von Unge | Assistant Sound Editor |
| Barnaby Smyth | Foley Artist |
| Keith Partridge | Foley Mixer |
| Chris Robins | Sound Mix Technician |
| Johnathan Rush | Sound Mix Technician |
| Neal Champion | Special Effects Supervisor |
| George Spensley-Corfield | Special Effects Technician |
| Carl St-Pierre | Compositor |
| Shailendra Kumar Pandey | Compositor |
| Tiago Barbosa | Digital Compositor |
| Nicolas Chavigny | Matte Painter |
| Maxime Moreira | Modeling |
| Samuel Rousseau | Rotoscoping Artist |
| Justin Hebert | Rotoscoping Artist |
| Yuliia Kondratova | Rotoscoping Artist |
| Shenouda Isaac Nazer | Rotoscoping Artist |
| Declan McGuire | Pipeline Technical Director |
| Marc-Olivier Rouleau | Pipeline Technical Director |
| Miguel Algora | VFX Artist |
| Michael Frattasio | VFX Artist |
| Yan Caspar Hirschbuehl | VFX Artist |
| Nicholas Bennett | Visual Effects Supervisor |
| Stephane Naze | Visual Effects Supervisor |
| Peter Marsden | Digital Imaging Technician |
| Mark Kozlowski | Digital Imaging Technician |
| Phoebe Fraser | Digital Imaging Technician |
| David Cormack | Electrician |
| Perry Cullen | Electrician |
| Stuart Hurley | Electrician |
| Duncan Steven | Grip |
| Josh Milne | Libra Head Technician |
| Gabriele Filippelli | Lighting Technician |
| Filippo Giansante | Lighting Technician |
| Mike King | Lighting Technician |
| Tommy Finch | Rigging Gaffer |
| Ane Stubberud | Assistant Accountant |
| Emma Woodvine | Dialogue Coach |
| Emma Woodvine | Dialect Coach |
| Oliver Stotter | Production Assistant |
| Abby Vickers | Production Assistant |
| Hugo Williams-Ellis | Production Assistant |
| Angela Moneke | Production Assistant |
| Oliver Cockerham | Production Coordinator |
| Lawrence Mason | Production Coordinator |
| Joshua Jason | Publicist |
| Sasha Gibson | Unit Publicist |
| Jo Nielsen | Hairstylist |
| Jacqueline Rathore | Hairstylist |
| Heather Manson | Makeup & Hair |
| Madlen Mierzwiak | Hairstylist |
| Ivana Primorac | Makeup Designer |
