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.

"House of the Dragon" is adding three more cast members to its upcoming season. Tom Cullen, Joplin Sibtain and Barry Sloane have been added to Season 3 of the HBO fantasy hit. Cullen, who is known for his work in the BBC series "The Gold" and the upcoming Channel 4 series "Trespasses,

The third season of House of the Dragon has added Tom Cullen, Joplin Sibtain, and Barry Sloane, reports Variety. The series is based on Fire and Blood by George RR Martin. The second season of the series followed the Greens and the Blacks as they furthered their struggle for control over the Iron Throne of Westeros.