Lily James Elizabeth Layton
Gary Oldman Winston Churchill
Kristin Scott Thomas Clemmie
Ben Mendelsohn King George VI
David Strathairn President Roosevelt (voice)
Samuel West Sir Anthony Eden
Dario Marianelli Original Music Composer
John Atterbury Sir Alexander Cadogan
Faye Marsay Sybil
Jeremy Child Lord Stanhope
Pip Torrens BBC Producer
Bronte Carmichael Young Girl on Tube
David Bamber Admiral Ramsay
Joe Wright Director
Stephen Dillane Viscount Halifax
Des Whelan Camera Operator
Tom Ashley Ramsay Staffer
Jack English Still Photographer
Sarah Flind Cook
Adrian Rawlins Air Chief Marshal Dowding
Demetri Goritsas Cabinet Secretary Bridges
Johnny Otto Member of Parliament (uncredited)
Michael Bott Equerry
Patsy Ferran Maid
Peter Marsden Digital Imaging Technician
John Locke Oliver Wilson
Joe Armstrong John Evans
Brian Pettifer Lord Kingsley Wood
Douglas Urbanski Producer
Phoebe Fraser Digital Imaging Technician
Hilton McRae Arthur Greenwood
David Schofield Clement Atlee
Robin Pearce Ernle Hastings
Malcolm Storry General Ironside
Paul Leonard Admiral Dudley Pound
Ronald Pickup Neville Chamberlain
Jina Jay Casting
Dan Channing-Williams First Assistant Director
Benjamin Whitrow Sir Samuel Hoare
Mary Antony Mary Churchill
Tim Bevan Producer
Joshua Higgott Reporter
Jo Neary Margaret Jerome
Neal Champion Special Effects Supervisor
Nicholas Jones Sir John Simon
Johnathan Rush Sound Mix Technician
Imogen King Teenage Girl at Tube Map
Aaron Hartley Second Assistant Director
Eric Fellner Producer
Joshua James W D Wilkinson (Secretary #2)
Vanessa Baker ADR Voice Casting
Rachel Desmarest Additional Casting
Keith Partridge Foley Mixer
Nia Gwynne Alice Simpson
James Harkness AD Nicholl (Secretary #1)
Flora Moody Key Makeup Artist, Key Hair Stylist
Bruno Delbonnel Director of Photography
Charley Palmer Rothwell Christopher Wilson (Photographer)
Thomas Napper Second Unit Director
Eric MacLennan Tom Leonard
James Eeles Maurice Baker
Bob Kretschmer Wigmaker
Carlos De Carvalho Second Unit Director of Photography
Philip Martin Brown Sawyers
Jacqueline Durran Costume Design
Anna Burnett Pamela Churchill
Cristian Knight Stunts
Jon Baker Armorer
Bethany Muir Sarah Churchill
Craig Berkey Sound Re-Recording Mixer, Supervising Sound Editor
Sarah Greenwood Production Design
Alex Clatworthy Diana Churchill