Popular British singer Ed Sheeran will reportedly star in a guest role in the seventh season of the HBO series Game of Thrones. "Guess the cats out the bag," tweeted Sheeran while confirming the news. "For years we tried to get Ed Sheeran on the show to surprise Maisie," said the show's co-creator David Benioff. Notably, Maisie Williams, who portrays Arya Stark, is Sheeran's fan.