David Benioff and D.B. Weiss have popped to tease that another role has been cast for the Game of Thrones pilot. As GRRM previously mentioned Ser Rodrik Cassel as one among a number of minor roles that were still being cast, it seems very possible that that’s the role that has been filled. It may also be that one of the Kingsguard who accompany Robert, Ser Boros Blount or Ser Meryn Trant, has been cast; although those roles are without lines in the pilot script, from what I have heard.