J.K. Simmons George Shultz
Hope Davis Nancy Reagan
Jared Harris Mikhail Gorbachev
Jeff Daniels Ronald Reagan
Jóhannes Haukur Jóhannesson Richard Perle
John Ross Bowie Ken Adelman
Aya Cash Cleo
Adrian Rawlins Max Rampleman
Branka Katić Raisa Gorbachev
Guy Burnet Alexander
Vladimir Kulich Sergey Akhromeyev
Tim Dutton Edward Shevardnadze
Michael Russell Gunn Writer, Director, Producer
Joi Johannsson KGB Colonel
Ivana Primorac Hair Designer, Makeup Designer
Catherine Burdon Margaret Clancy
Hjörtur Jóhann Jónsson Major Alexei Ivanov
Kristín Lea Sigríðardóttir Soviet Attaché
Magdalena Górka Director of Photography
Stephen Brennan Paul Nitze
Ebba Guðný Guðmundsdóttir Protocol Officer (uncredited)
Ari Freyr Isfeld Oskarsson KGB Officer
Einar Haraldsson USSR Negotiating Team (uncredited)
Christopher Hammond Producer
Austin Wintory Original Music Composer
Jón Jónsson TV Reporter (uncredited)
John Logan Pierson Producer
Stefán Þór Þorgeirsson Shultz Staffer (uncredited)
Laura Steiger Editor
Jóel Sæmundsson CIA Officer
Alexander Briem Journalist (uncredited)
Michael L. Sale Editor
Tommi Thor Gudmundsson US Notetaker (uncredited)
Jafet Máni Magnúsarson Gorbachev KGB (uncredited)
Sigurdur Jefferson Colonel Tim Schilling
Dagur Þór Óskarsson Stand In (uncredited)
Brynja Anderiman Horse Rider
Tristan Roche Samantha Lightning - WH Staffer
Axel Ólafsson KGB Notetaker (uncredited)
Sara Rut Arnardóttir Ronald Regan Assistant (uncredited)