Gary Oldman Winston Churchill
Faye Marsay Sybil
Kristin Scott Thomas Clemmie
Lily James Elizabeth Layton
Stephen Dillane Viscount Halifax
Samuel West Sir Anthony Eden
Ben Mendelsohn King George VI
David Strathairn President Roosevelt (voice)
Pip Torrens BBC Producer
David Bamber Admiral Ramsay
Patsy Ferran Maid
Joe Wright Director
Joe Armstrong John Evans
Adrian Rawlins Air Chief Marshal Dowding
Tim Bevan Producer
Bronte Carmichael Young Girl on Tube
Joshua James W D Wilkinson (Secretary #2)
David Schofield Clement Atlee
Ronald Pickup Neville Chamberlain
Richard Glover Brigadier Nicholson
James Harkness AD Nicholl (Secretary #1)
Anna Burnett Pamela Churchill
James Biddle Executive Producer
Jeremy Child Lord Stanhope
Jon Baker Armorer
Kazu Hiro Prosthetic Makeup Artist, Hair Designer
Benjamin Whitrow Sir Samuel Hoare
Jina Jay Casting
John Locke Oliver Wilson
Imogen King Teenage Girl at Tube Map
Malcolm Storry General Ironside
Anthony McCarten Producer, Screenplay
Dario Marianelli Original Music Composer
Nicholas Jones Sir John Simon
Philip Martin Brown Sawyers
Eric Fellner Producer
Thomas Dixon Assistant Production Coordinator
Paul Ridley House of Commons Speaker
Demetri Goritsas Cabinet Secretary Bridges
Charley Palmer Rothwell Christopher Wilson (Photographer)
Sarah Flind Cook
Cristian Knight Stunts
Jacqueline Durran Costume Design
Sarah Greenwood Production Design
Michael Bott Equerry
Jeremy Braben Aerial Director of Photography
Thomas Napper Second Unit Director
Hilton McRae Arthur Greenwood
Vanessa Baker ADR Voice Casting
Richard Lumsden General Ismay
Mark Appleby ADR Mixer
Johnny Otto Member of Parliament (uncredited)
Bruno Delbonnel Director of Photography
Steven Morris Assistant Property Master
Jordan Waller Randolph Churchill
Christine Whitney Makeup Supervisor, Hair Supervisor
Douglas Urbanski Producer
Leonard Woodcock Stunts
John Casali Production Sound Mixer
Olivier Broche Reynaud
Julian Bucknall First Assistant "A" Camera
Michael Gould Lord Londonderry
Brian Pettifer Lord Kingsley Wood
Hannah Steele Abigail Walker
Jack Ridout Lighting Technician
Jo Wallett Production Manager
Tom Edmondson Second Unit First Assistant Director
Bethany Muir Sarah Churchill
Paul Cotterell Sound Re-Recording Mixer
Jo Neary Margaret Jerome
Barnaby Smyth Foley Artist
Paul Leonard Admiral Dudley Pound