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