Gatiss is the co-creator and co-star of another British favorite, Sherlock, where he plays Holmes’ mysterious brother Mycroft.
Additionally, the British writer-producer-actor has written Doctor Who novels and episodes of the BBC classic, as well as acted on the long-running series.
No information on just who Gatiss would play in the fourth season of the mega popular period fantasy series.
There is a possibility that show creators David Benioff and Dan Weiss will say more at their Comic-Con panel on Friday.
Sherlock is also making its first-ever SDCC panel appearance on Thursday, according to EW’s James HIbberd, who will moderate.
Hopefully Gatiss has some insights at the Con.
Producers of Game of Thrones also announced the line-up of directors to helm the series for Season Four.
According to EW the Neil Marshall will return to direct episode 9 of the new season. For Season three he was at the helm for Season Two’s critical Battle of the Blackwater episode.
Fans will also keep an eye out for The West Wing Emmy-winner director Alex Graves, who was very impressive last season with the two episodes he directed, one of which included a stunning sequence where Daenerys unleashed her dragon on a slave city. For Season Four, Graves is doing four episodes.
David Benioff and D.B. Weiss will also take on another episode this season.
Neil Marshal will direct the ever critical episode 9, which historically is the climax for the season.
Here is the complete list of Season Four episodes and their directors. The new season is filming now.
Episode 1: David Benioff & D.B. Weiss
Episodes 2, 3, 8, 10: Alex Graves
Episodes 4, 5: Michelle MacLaren
Episodes 6, 7: Alik Sakharov
Episodes 9: Neil Marshall
More information on Game of Thrones to come from San Diego Comic-Con.