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 Harry Collett Prince Jacaerys "Jace" Velaryon Actor Jefferson Hall Lord Jason Lannister, Ser Tyland Lannister 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 Taylor Lord Cregan Stark Actor Vincent Regan Ser Rickard Thorne 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