According to the Daily Mirror, a senior executive has confirmed that "exploratory talks" with the actor took place, after he was sworn to secrecy about Jon Snow's return to the series.
"Any spin-off built around Jon Snow, who is hugely popular with fans, would also undoubtedly involve other characters from the cast," a source said.
"When the final season wraps next year, it's going to be a case of figuring out who we want to join us for a new series and which of those cast members actually want to jump on board."