"House of the Dragon"'s core cast has a stacked list of actors, including Paddy Considine, Emmy D'Arcy, Matt Smith, Rhys Ifans, Olivia Cooke, Fabien Frankel, Steve Toussaint, Eve Best, and Sonoya Mizuno. Other names who round out the cast include Ryan Corr, Jefferson Hall, David Horovitch, Graham McTavish, Matthew Needham, Bill Patterson, and Gavin Spokes.