Joe Wright Director Gary Oldman Winston Churchill Actor Kristin Scott Thomas Clementine Churchill Actor Ben Mendelsohn King George VI Actor Lily James Elizabeth Layton Actor Ronald Pickup Neville Chamberlain Actor Stephen Dillane Viscount Halifax Actor Nicholas Jones Sir John Simon Actor Samuel West Sir Anthony Eden Actor Richard Lumsden General Ismay Actor Charley Palmer Rothwell Miles Aldridge Actor Hannah Steele Abigail Walker Actor Anthony McCarten Screenwriter, Producer Tim Bevan Producer Eric Fellner Producer Lisa Bruce Producer Douglas Urbanski Producer James Biddle Executive Producer Lucas Webb Executive Producer Liza Chasin Executive Producer Bruno Delbonnel Cinematographer Valerio Bonelli Film Editing Dario Marianelli Original Music Sarah Greenwood Production Design Katie Spencer Set Decoration Jacqueline Durran Costume Design Jina Jay Casting