'Sherlock' co-creator and star Mark Gatiss has signed up for a role in the fourth season of 'Game of Thrones'.
Gatiss, who found fame in British comedy 'The League Of Gentleman', is most well known for his role as Mycroft in BBC One's 'Sherlock' and also for his work as a writer on 'Doctor Who', reported a daily.
Gatiss' role is currently being kept secret.
The actor is appearing at this year's Comic-Con event in San Diego promoting the third series of 'Sherlock'.
It was previously confirmed that Pedro Pascal would be starring as Prince Oberyn 'The Red Viper' Martell in the show's fourth season.