Paddy Considine King Viserys Targaryen Actor Matt Smith Prince Daemon Targaryen Actor Rhys Ifans Otto Hightower Actor Steve Toussaint Lord Corlys Velaryon ("The Sea Snake") Actor Eve Best Princess Rhaenys Targaryen Actor Sonoya Mizuno Mysaria Actor Fabien Frankel Ser Criston Cole Actor Milly Alcock Young Princess Rhaenyra Targaryen Actor Emily Carey Young Alicent Hightower Actor Graham McTavish Ser Harrold Westerling Actor Gavin Spokes Lord Lyonel Strong Actor David Horovitch Grand Maester Mellos Actor Bill Paterson Lord Lyman Beesbury Actor Anthony Flanagan Ser Steffon Darklyn Actor George R.R. Martin Executive Producer Ryan Condal Executive Producer, Writer Miguel Sapochnik Executive Producer Vince Gerardis Executive Producer Sara Hess Executive Producer, Writer Ron Schmidt Executive Producer Clare Kilner Director Geeta Patel Director Greg Yaitanes Director David Hancock Co-Executive Producer Jocelyn Diaz Consulting Producer Charmaine De Grate Writer, Co-Executive Producer