Entertainment Game of Thrones Prequel Casts Poldark Star in Key Role – IGN News Published October 31, 2018 http://assets14.ign.com/videos/zencoder/2018/10/31/640/458b767785972de1ea3d7a2133696667-347000-1541019072.mp4Poldark star Josh Whitehouse has been cast in a key role in the upcoming Game of Thrones prequel series.