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)