The Lannisters were kings in their right before they were forced to kneel to Aegon the Conqueror. Although they were allowed to keep their fortune, they were reduced to mere lords, and had little influence at the royal court during the first century of Targaryen rule. This did not change until Jason and Tyland Lannister played major roles in the Dance of the Dragons. In House of the Dragon, the Lannister twins are portrayed by Jefferson Hall (who, incidentally, also appeared in Game of Thrones as Ser Hugh of the Vale).