 Tobey MaguireBobby Fischer | Bobby Fischer |
 Peter SarsgaardFather Bill Lombardy | Father Bill Lombardy |
 Liev SchreiberBoris Spassky | Boris Spassky |
 Michael StuhlbargPaul Marshall | Paul Marshall |
 Lily RabeJoan Fischer | Joan Fischer |
 Sophie NélisseYoung Joan | Young Joan |
 Seamus Davey-FitzpatrickTeen Bobby Fischer | Teen Bobby Fischer |
 Conrad PlaCarmine Nigro | Carmine Nigro |
 Aiden LovekampYoung Bobby Fischer | Young Bobby Fischer |
 Evelyne BrochuDonna | Donna |
 Robin WeigertRegina Fischer | Regina Fischer |
 Andreas ApergisUncle Paul | Uncle Paul |
 Katie Bird NolanMaria | Maria |
 Ilia VolokKGB Agent | KGB Agent |
 Peter JanovKGB Agent | KGB Agent |
 Spiro MalandrakisReporter | Reporter |
 Arthur HoldenParty Guest #3 | Party Guest #3 |
 Raphael Grosz-HarveyDonald Byrne | Donald Byrne |
 John MaclarenTheodore Tremblay | Theodore Tremblay |
 Vitali MakarovYovanovic | Yovanovic |
| EEric Lee HuffmanKGB Bodyguard | KGB Bodyguard |
 Brett WatsonLothar Schmid | Lothar Schmid |
 Shawn CampbellCyril Pustan | Cyril Pustan |
 Eugene NomuraJapanese Anchorman | Japanese Anchorman |
 Norman LehnertGerman Reporter | German Reporter |
 Edward ZinovievGeller | Geller |
| SSam StoneDeli Customer | Deli Customer |
 Jonathan DubskyTremblay's Aide | Tremblay's Aide |
 Mark SlackeIcelandic Journalist | Icelandic Journalist |
 Alexandre GorchkovIivo Nei | Iivo Nei |
