This article includes content relating to the Dance of the Dragons, and therefore contains potential spoilers for House of the Dragon, as revealed in GRRM's writings. Anyone wishing to remain completely spoiler free for the new show should avoid any articles displaying this tag.
Harrold is one of the longest-serving members of the Kingsguard. He was once a powerful knight with a successful military background, and eventually succeeded Ser Ryam Redwyne as Lord Commander. He is tasked by the king to watch over and guard Rhaenyra Targaryen.
Behind the scenes
Harrold Westerling was announced as a recurring character in House of the Dragon on December 8, 2020.