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  ===Casting===
  Pilou Asbæk plays Euron Greyjoy.
  The sixth season saw the return of Isaac Hempstead Wright as Bran Stark, Kristian Nairn as Hodor, Ellie Kendrick as Meera Reed, Gemma Whelan as Yara Greyjoy, and Rory McCann as Sandor "The Hound" Clegane,  who did not appear in the fifth season. Clive Russell, Tobias Menzies, Patrick Malahide, Richard Dormer and Paul Kaye also returned to the show as Brynden Tully, Edmure Tully, Balon Greyjoy, Beric Dondarrion and Thoros of Myr after not appearing since the third season. Jonathan Pryce as the High Sparrow was added to the series main cast after appearing in a recurring role in the previous season.
  Across the Narrow Sea, Melanie Liburd plays a Red priestess from Asshai who is in R'hllor's service. At the Reach, House Tarly is introduced, with Freddie Stroma joining the cast as Samwell Tarly's brother Dickon Tarly, a character who was mentioned in the novels but has yet to appear in them. Other members of House Tarly that were introduced were Randyll Tarly, played by James Faulkner; Melessa Tarly, played by Samantha Spiro and Talla Tarly, who was portrayed by Rebecca Benson.
  Veteran actor Max von Sydow was cast to play the Three-Eyed-Raven, who is training Bran. The character was previously played by Struan Rodger in the fourth-season finale "The Children". David Bradley confirmed in August 2015, that he would be returning to the show as Walder Frey after last appearing in the third-season finale "Mhysa", but he did not confirm when he would be returning. After the second official trailer was released, it was confirmed that Bradley would appear in the sixth season. Danish actor Pilou Asbæk joins the show as Theon Greyjoy's uncle, pirate captain Euron Greyjoy. Members of the Icelandic band Of Monsters and Men made cameo appearances. Ricky Champ played Gatins, an outlaw who is a part of a band using religion to justify extorting the people of the countryside. A young Ned Stark was portrayed by Sebastian Croft in a flashback scene.
  The sixth season also included a traveling theater troupe located in Braavos that stages a play called "The Bloody Hand", about the events that have taken place in King's Landing since the beginning of the series. Essie Davis and Kevin Eldon joined the cast in this theater troupe, portraying actors playing Cersei Lannister and Ned Stark, respectively, while Richard E. Grant was cast as the troupe's manager. Members of Icelandic indie band Of Monsters and Men appear as the musicians of the Braavos theatre group.