Gary Oldman Winston Churchill
Lily James Elizabeth Layton
Kristin Scott Thomas Clemmie
Ben Mendelsohn King George VI
Faye Marsay Sybil
Samuel West Sir Anthony Eden
Joe Wright Director
Pip Torrens BBC Producer
Bronte Carmichael Young Girl on Tube
David Strathairn President Roosevelt (voice)
David Bamber Admiral Ramsay
Stephen Dillane Viscount Halifax
Jeremy Child Lord Stanhope
Douglas Urbanski Producer
Rachel Desmarest Additional Casting
Sarah Flind Cook
Johnathan Rush Sound Mix Technician
Adrian Rawlins Air Chief Marshal Dowding
Joshua James W D Wilkinson (Secretary #2)
Tim Bevan Producer
Aaron Hartley Second Assistant Director
Hilton McRae Arthur Greenwood
Hannah Steele Abigail Walker
Demetri Goritsas Cabinet Secretary Bridges
Mary Antony Mary Churchill
Dario Marianelli Original Music Composer
Alex Clatworthy Diana Churchill
Nia Gwynne Alice Simpson
Ian Creed Marine Coordinator
James Harkness AD Nicholl (Secretary #1)
Charlotte Llewelyn Digital Intermediate Producer
Paul Leonard Admiral Dudley Pound
Patsy Ferran Maid
David Schofield Clement Atlee
Johnny Otto Member of Parliament (uncredited)
Robin Pearce Ernle Hastings
Ivana Primorac Makeup Designer, Hair Designer
Imogen King Teenage Girl at Tube Map
John Atterbury Sir Alexander Cadogan
Ronald Pickup Neville Chamberlain
Benjamin Whitrow Sir Samuel Hoare
Joe Armstrong John Evans
Joanna Neary Margaret Jerome
Philip Martin Brown Sawyers
Nicholas Jones Sir John Simon
Peter Marsden Digital Imaging Technician
Tom Ashley Ramsay Staffer
Brian Pettifer Lord Kingsley Wood
Michael Bott Equerry
Louis Phillips Executive In Charge Of Production
Ane Stubberud Assistant Accountant
Charley Palmer Rothwell Christopher Wilson (Photographer)
Anna Burnett Pamela Churchill
Richard Lumsden General Ismay
Jack English Still Photographer
Malcolm Storry General Ironside
John Casali Production Sound Mixer
David Pearce Second Assistant "A" Camera
Jacqueline Durran Costume Design
Tamara Catlin-Birch Set Decorating Coordinator, Art Department Coordinator
Jina Jay Casting
Sarah Greenwood Production Design
Flora Nicholson Jessie Sutton
Yan Caspar Hirschbuehl VFX Artist
Jordan Waller Randolph Churchill
Anthony McCarten Producer, Screenplay
John Locke Oliver Wilson
Eric Fellner Producer
Nick Gottschalk Supervising Art Director
Thomas Napper Second Unit Director
Bethany Muir Sarah Churchill
Vanessa Baker ADR Voice Casting