Neil Fingleton, who played Game of Thrones’ Mag the Mighty, has died at the age of 36. The 7’7†actor, who held the title of the U.K.’s tallest man, reportedly suffered heart failure on Saturday. Fingleton began his career as a professional basketball player, playing in countries across the world before turning to acting. In addition to his role on Game of Thrones, Fingleton appeared in works including Doctor Who, X-Men: First Class, Avengers: Age of Ultron, and Jupiter Ascending.