‘House of the Dragon’ stars Emma D’Arcy and Olivia Cooke speak to ‘Extra’s’ Jenn Lahmers about the long-awaited ‘Game of Thrones’ prequel. Emma dishes on their character Rhaenyra Targaryen’s desire for the throne and for agency as a woman. Olivia also teases that her character Alicent Hightower becomes a pawn in her father’s political agenda. Plus, Emma reflects on being the first non-binary person cast in the ‘Game of Thrones’ franchise. ‘House of the Dragon’ premieres August 21 on HBO and HBO Max.