Gary OldmanWinston Churchill Stephen DillaneViscount Halifax Lily JamesElizabeth Layton Ronald PickupNeville Chamberlain Ben MendelsohnKing George VI Kristin Scott ThomasClemmie Nicholas JonesSir John Simon Samuel WestSir Anthony Eden David SchofieldClement Atlee Richard LumsdenGeneral Ismay Malcolm StorryGeneral Ironside Hilton McRaeArthur Greenwood Benjamin WhitrowSir Samuel Hoare Adrian RawlinsAir Chief Marshal Dowding David BamberAdmiral Ramsay Paul LeonardAdmiral Dudley Pound David StrathairnPresident Roosevelt (voice) Eric MacLennanTom Leonard Philip Martin BrownSawyers Demetri GoritsasCabinet Secretary Bridges Jordan WallerRandolph Churchill Alex ClatworthyDiana Churchill Mary AntonyMary Churchill Bethany MuirSarah Churchill Anna BurnettPamela Churchill Jeremy ChildLord Stanhope Brian PettiferLord Kingsley Wood Michael GouldLord Londonderry Paul RidleyHouse of Commons Speaker Robin PearceErnle Hastings Hannah SteeleAbigail Walker Ade Dee HaastrupMarcus Peters Flora NicholsonJessie Sutton Bronte CarmichaelYoung Girl on Tube Roisin O'NeillAgnes Dillon Richard GloverBrigadier Nicholson Imogen KingTeenage Girl at Tube Map Miles GallantNaval Map-Room Officer John AtterburySir Alexander Cadogan James HarknessAD Nicholl (Secretary #1) Joshua JamesW D Wilkinson (Secretary #2) Charley Palmer RothwellChristopher Wilson (Photographer) Steffan DonnellyBack Bencher Kieran BuckeridgeCecil Beaton Johnny OttoMember of Parliament (uncredited) Nick Howden-SteenstraSentry (uncredited) Anthony McCartenScreenplay / Producer James BiddleExecutive Producer Netty ChapmanAssistant Set Decoration Katie SpencerSet Decoration Oliver GoodierArt Direction Sarah GreenwoodProduction Design Bruno DelbonnelDirector Of Photography Jeremy BrabenAerial Director Of Photography Carlos De CarvalhoSecond Unit Director Of Photography Joel ChristopherCostume Assistant Geo PavlovCostume Illustrator John UsherCostume Assistant Bonnie RadcliffeCostume Assistant Hayley Clair StewartCostume Assistant Jacqueline RathoreHairstylist Heather MansonMakeup & Hair Madlen MierzwiakHairstylist Ivana PrimoracMakeup Designer Flora MoodyKey Makeup Artist Jacqueline DurranCostume Design Andrea CrippsAssistant Costume Designer Lucy SibbickProsthetic Makeup Artist Sophie Hart-WalshSet Costumer Claire WatsonCostume Coordinator David MalinowskiProsthetic Makeup Artist Christine WhitneyMakeup Supervisor Sarah MooneySecond Assistant Director Tom EdmondsonSecond Unit First Assistant Director Thomas NapperSecond Unit Director Aaron HartleySecond Assistant Director Gayle DickieSecond Assistant Director Dan Channing-WilliamsFirst Assistant Director Phoebe BillingtonScript Supervisor Matt AdamsDigital Intermediate Jenny-Jayne WebbDigital Intermediate Editor Charlotte LlewelynDigital Intermediate Producer Maikel PopicDailies Operator Cherri ArpinoDailies Manager Tommaso GalloneFirst Assistant Editor Oskar von UngeAssistant Sound Editor Keith PartridgeFoley Mixer Johnathan RushSound Mix Technician Barnaby SmythFoley Artist Chris RobinsSound Mix Technician Chris MurphyBoom Operator John CasaliProduction Sound Mixer Paul CarterSound Designer Paul CotterellSound Re-Recording Mixer Craig BerkeySound Re-Recording Mixer Michael MaroussasDialogue Editor Becki PontingSupervising Sound Editor Dario MarianelliOriginal Music Composer Rebecca CronsheyResearcher Tiffany TiesieraProduction Executive Elliot WoodExtras Casting Tanya MellottePayroll Accountant Katy LawrenceProduction Secretary Vanessa BakerAdr Voice Casting Alice O'DonoghueCasting Assistant Rachel DesmarestAdditional Casting Samuel HarmanProduction Secretary Charlie RotheramExtras Casting Sanjay SharmaProduction Executive Daniel BuddProduction Accountant Oliver StotterProduction Assistant Ane StubberudAssistant Accountant Angela MonekeProduction Assistant Oliver CockerhamProduction Coordinator Hugo Williams-EllisProduction Assistant Abby VickersProduction Assistant Lawrence MasonProduction Coordinator Jo WallettProduction Manager Louis PhillipsExecutive In Charge Of Production Jessie FrostCasting Associate Thomas DixonAssistant Production Coordinator Tiago BarbosaDigital Compositor Neal ChampionSpecial Effects Supervisor Marc-Olivier RouleauPipeline Technical Director Yuliia KondratovaRotoscoping Artist Shenouda Isaac NazerRotoscoping Artist Yan Caspar HirschbuehlVfx Artist Justin HebertRotoscoping Artist Michael FrattasioVfx Artist Stephane NazeVisual Effects Supervisor Declan McGuirePipeline Technical Director Nicholas BennettVisual Effects Supervisor Nicolas ChavignyMatte Painter Samuel RousseauRotoscoping Artist Patricia LeblancVisual Effects Coordinator Warwick HewettVisual Effects Producer Kyle GreenbergDigital Compositor Alex JadfardDigital Compositor Laurence ProvostMatte Painter Tracie DonaisDigital Compositor Alexander IsakssonMatte Painter Gudjon KristjanssonDigital Compositor Anne-Marie OuelletVisual Effects Production Assistant 
