Gary Oldman (George Smiley)
Colin Firth (Bill Haydon)
Tom Hardy (Ricki Tarr)
Mark Strong (Jim Prideaux)
Ciarán Hinds (Roy Bland)
Svetlana Khodchenkova (Irina)
David Dencik (Toby Esterhase)
Benedict Cumberbatch (Peter Guillam)
Toby Jones (Percy Alleline)
Kathy Burke (Connie Sachs)
Stephen Graham (Jerry Westerby)
Simon McBurney (Oliver Lacon)
John Hurt (Control)
Zoltán Musci (Magyar)
Arthur Nightingale (Bryant)
Amanda Fairbank-Hynes (Belinda)
Peter McNeil O'Connor (Fawn)
Roger Lloyd-Pack (Mendel)
Matyelok Gibbs (Mrs. Pope Graham)
Philip Hill-Pearson (Norman)
Jamie Thomas King (Kaspar)
Stuart Graham (Minister)
Konstantin Khabenskiy (Polyakov)
Sarah-Jane Robinson (Mary Alleline)
Katrina Vasilieva (Ann Smiley)
Linda Marlowe (Mrs. McCraig)
William Haddock (Bill Roach)
Erskine Wylie (Spikeley)
Philip Martin Brown (Tufty Thesinger)
Tomasz Kowalski (Boris)
Alexandra Salafranca (Turkish Mistress)
Denis Khoroshko (Ivan)
Oleg Dzhabrailov (Sergei)
Gillian Steventon (Listening Woman)
Nick Hopper (Janitor Alwyn)
Laura Carmichael (Sal)
Rupert Procter (Guillam's Boyfriend)
Michael Sarne (Voice of Karla)
Christian McKay (Mackelvore)
Jean-Claude Jay (French Man at Residency)
Tom Stuart (Ben)
Péter Kálloy Molnár (Hungarian Waiter)
Ilona Kassai (Woman in Window)
Imre Csuja (KGB Agent)