TMDb/House of the Dragon TV New Targaryen casting! Pearl Clark joins House of the Dragon Season 3 as Princess Jaehaera. Discover her role in the Dance of the Dragons, premiering June 2026. March 11, 2026 AceShowbiz - House of the Dragon is preparing for its third season with a significant casting update involving the Targaryen family. The HBO series will introduce a new actor to play Princess Jaehaera Targaryen, hinting at fresh developments in the storyline set to premiere in June 2026.