The musicians' roles are being kept under wraps, although they are currently shooting their episode in Croatia. Showrunners D.B. Weiss and David Benioff are big fans of the group, and they would listen to their music while shooting in Iceland, one of several countries used during each season of the hit HBO series.
Game of Thrones have previously enlisted musicians from Coldplay and Snow Patrol for guest-starring appearances on the show. It isn't known if the band will perform either on the show, or for the soundtrack. In the past, the series tapped bands The National and The Hold Steady to perform songs "The Rains of Castamere" and "The Bear and the Fair Maiden," based on lyrics in George R.R. Martin's books.