Steve Toussaint as Lord Corlys Velaryon, “The Sea Snake”: Lord of House Velaryon, a Valyrian bloodline as old as House Targaryen. A peerless warrior and a dragonrider, Daemon possesses the true blood of the dragon. But it is said that whenever a Targaryen is born, the gods toss a coin in the air… Matt Smith as Prince Daemon Targaryen: The younger brother to King Viserys and heir to the throne. Martin’s “A Song of Ice and Fire” series - or “Fire & Blood,” the book on Targaryen family history on which “House of the Dragon” is based - and have no idea who those characters are yet, here are the descriptions, courtesy of HBO:Įmma D’Arcy as Princess Rhaenyra Targaryen: The king’s first-born child, she is of pure Valyrian blood, and she is a dragonrider. Many would say that Rhaenyra was born with everything… but she was not born a man. Now in case you aren’t an avid reader of George R.R.

‘Game of Thrones’ Prequel ‘House of the Dragon’ Begins Production in the UK