Ryan Condal Creator, Executive Producer, Writer 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 George R.R. Martin Executive Producer Sara Hess Executive Producer Alan Taylor Executive Producer, Director Melissa Bernstein Executive Producer Kevin De La Noy Executive Producer Loni Peristere Executive Producer Vince Gerardis Executive Producer