It has been revealed that Sherlock co-creator and star Mark Gatiss has joined season four of Game Of Thrones.

Gatiss is well known for starring in The League of Gentlemen and more recently has been seen as the sleuth’s brother, Mycroft in BBC One’s Sherlock. He has also worked as a writer on Doctor Who.

Entertainment Weekly reports that he will join Game of Thrones although there is no information about the role he will take on.

He is appearing at this year’s Comic-Con event in San Diego which gets underway today where he is due to discuss series three of Sherlock but now may also join the Game of Thrones panel.