Matt Smith Prince Daemon Targaryen Actor Emma D'Arcy Princess Rhaenyra 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 Olivia Cooke Alicent Hightower Actor Phoebe Campbell Lady Rhaena Targaryen Actor Ewan Mitchell Prince Aemond Targaryen Actor Tom Glynn-Carney King Aegon II Targaryen Actor Harry Collett Prince Jacaerys "Jace" Velaryon Actor Bethany Antonia Lady Baela Targaryen Actor Phia Saban Queen Helaena Targaryen Actor Jefferson Hall Lord Jason Lannister, Ser Tyland Lannister Actor Matthew Needham Lord Larys Strong Actor Abubakar Salim Alyn of Hull Actor Freddie Fox Ser Gwayne Hightower Actor Simon Russell Beale Ser Simon Strong Actor Kieran Bew Hugh Actor Gayle Rankin Alys Rivers Actor Clinton Liberty Addam of Hull Actor Jamie Kenna Ser Alfred Broome Actor Tom Bennett Ulf Actor Tom Taylor Lord Cregan Stark Actor Vincent Regan Ser Rickard Thorne Actor Kurt Egyiawan Grand Maester Orwyle Actor Ellora Torchia Kat Actor Dan Fogler Ser Torrhen Manderly Actor Tom Cullen Ser Luthor Largent Actor Chook Sibtain Ser "Bold" Jon Roxton Actor Sir Simon Russell Beale Ser Simon Strong Actor Tommy Flanagan Ser Roderick Dustin Actor James Norton Actor George R.R. Martin Executive Producer Ryan Condal Executive Producer Sara Hess Executive Producer Alan Taylor Executive Producer Melissa Bernstein Executive Producer Kevin De La Noy Executive Producer Loni Peristere Executive Producer Vince Gerardis Executive Producer Miguel Sapochnik Executive Producer Ron Schmidt Executive Producer Danny Gulliver Producer