Tom Cullen (“The Gold,” “Trespasses”), Joplin Sibtain (“Andor,” “Safe”), and Barry Sloane (“Sandman,” “Revenge”) have all joined the upcoming season of the hit “Game of Thrones” prequel. Cullen will play Ser Luthor Largent, with Sibtain set as Ser “Bold” Jon Roxton and Sloane as Ser Adrian Redfort.

The Game of Thrones universe is once again expanding as a third season for its prequel show, House of the Dragon, is gearing up for a potential 2026 summer premiere.

The much-anticipated third season of 'House of the Dragon' expands its cast with actors Tom Cullen, Joplin Sibtain, and Barry Sloane. As the fantasy series, a prequel to 'Game of Thrones,' begins filming,