In George R. R. Martin's novel "Fire & Blood," Ser Harrold Westerling, played by Graham McTavish, is only mentioned briefly and seemingly does not have much of a role in the civil war known as the Dance of the Dragons or the events surrounding it. In the new television adaptation, though, the Kingsguard is a recurring character. As a sworn protector of King Viserys I and his family, Westerling is tasked with serving as a bodyguard and guide for Rhaenyra Targaryen. He accompanies the young woman almost everywhere she goes and is a great knight known around the Seven Kingdoms.
McTavish is no stranger to action roles, having made regular appearances in both "Outlander" and "Preacher." He's also popped up in a few major movies, having played the dwarf Dwalin in Peter Jackson's "The Hobbit" trilogy and performed in the 2008 film "Rambo." McTavish is also a noted voice actor, lending his vocal talents to a number of video games. These include parts in "Call of Duty: Modern Warfare 2," "inFamous 2," and "Star Wars: The Old Republic." His most notable voice role came in "Uncharted 2: Among Thieves," where he voiced the villain Zoran Lazarević. Outside of video games, he has also portrayed Loki in a number of animated Marvel series and films.
