Ramsey also had a major supporting role in the second season of His Dark Materials, and made a guest appearance in the Cartoon Network’s Summer Camp Island.
Fans have also rallied around fellow Game of Thrones alum Nikolaj Coster-Waldau to portray Joel in the upcoming series.
HBO will co-produce the upcoming series with Sony Pictures Television, with PlayStation Productions, Word Games, The Mighty Mint and Naughty Dog also producing.
Naughty Dog’s other co-president, Evan Wells, will executive produce, alongside Asad Qizilbash and Carter Swan of PlayStation Productions and Carolyn Strauss.
Game of Thrones is available to stream on Now TV.