Gary Oldman may reprise his role from Tinker Tailor Soldier Spy.
The actor revealed that there were discussions about adapting John le Carré's follow-up novel Smiley's People.
Oldman would return to his part as George Smiley in the movie.
"I think they're whispering now that they might do Smiley's People, not so much as a sequel, because there's a book in the middle actually, but we've set up the world and we'll revisit," he told ComingSoon.net.
The project would see him playing a Smiley even older than the character was in Tinker Tailor Soldier Spy.
The film was directed by Tomas Alfredson and co-starred Colin Firth.
Oldman has recently been connected to the role of Merlin in Warner Bros' Arthur & Lancelot.
Tinker Tailor Soldier Spy was released in the UK in September. It will open in the US on December 9.
Watch the trailer for Tinker Tailor Soldier Spy below: