Game of Thrones Star Neil Fingleton Dead at 36

Neil Fingleton, the remarkably tall actor who was best known for portraying Mag the Mighty on HBO's Game of Thrones, died Saturday due to heart failure, TMZ reports. He was 36.

The 7-foot-7 British thesp had a brief but still memorable career on the small and big screens, earning his first credit for a cameo role in X-Men: First Class and subsequently earning parts in films like 47 Ronin, Jupiter Ascending, and Avengers: Age of Ultron.

In his short-lived Game of Thrones role, Fingleton played Mag the Mighty, aka Mar Tun Doh Weg, in the series' fourth season, a character that was a member of Mance Rayder's wildling army and helped the free-folk breach the wall during the Battle of Castle Black.

Fingleton also portrayed Fisher King on the BBC America'sDoctor Who in 2015.

Fingleton was a collegiate and professional basketball player before taking up a screen career and held the distinction of being the United Kingdom's tallest man during his lifetime.