‘Game of Thrones’ Prequel ‘House of the Dragon’ Adds Four to Cast

The “Game of Thrones” prequel series “House of the Dragon” at HBO is adding four new actors to its cast.

Steve Toussaint, Rhys Ifans, Eve Best, and Sonoya Mizuno are all joining the highly-anticipated prequel to the megahit HBO show. They join previously announced stars Paddy Considine, Olivia Cooke, Emma D’Arcy, and Matt Smith.

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“House of the Dragon” is set a few hundred years prior to the events of “Game of Thrones” and tells the story of House Targaryen and the Targaryen civil war that became known as the “Dance of the Dragons.”

Toussaint will star as Lord Corlys Velaryon, “The Sea Snake.” Lord of House Velaryon, a Valyrian bloodline as old as House Targaryen. As “The Sea Snake,” the most famed nautical adventurer in the history of Westeros, Lord Corlys built his house into a powerful seat that is even richer than the Lannisters and that claims the largest navy in the world.

Touissaint’s previous film roles include “Judge Dredd,” “Prince of Persia,” and “Shooting Dogs.” He was recently seen in Steve McQueen’s “Small Axe” series and has appeared on shows like “Doctor Who,” “Pine Gap,” and “Doctors.”

Ifans will play Otto Hightower. The Hand of the King, Ser Otto loyally and faithfully serves both his king and his realm. As the Hand sees it, the greatest threat to the realm is the king’s brother, Daemon (Smith), and his position as heir to the throne.

Ifans perhaps most famously appeared in the 1999 romantic comedy “Notting Hill,” but has starred in other films like “Alice and Wonderland: Looking through the Glass,” “Snowden,” and “Harry Potter and the Deathly Hallows.”

Best will appeare as Princess Rhaenys Velaryon. A dragonrider and wife to Lord Corlys Velaryon, “The Queen Who Never Was” was passed over as heir to the throne at the Great Council because the realm favored her cousin, Viserys, simply for being male.

Best previously starred in the Showtime series “Nurse Jackie” and most recently appeared in Netflix’s “Fate: The Winx Saga.” She also appeared in Oscar winner “The King’s Speech” and the miniseries “The Honourable Woman.”

Mizuno joins as Mysaria. She came to Westeros with nothing, sold more times than she can recall. She could have wilted… but instead she rose to become the most trusted — and most unlikely — ally of Prince Daemon Targaryen, the heir to the throne.

Mizuno is known for her collaborations with Alex Garland, specifically the features “Ex Machina” and “Annihilation” and the FX limited series “Devs.” She also appeared in the Netflix limited series “Maniac.”

Toussaint is repped by CDA London. Ifans is represented by Gersh, 42, and Brillstein Entertainment Partners. Best is repped by Independent Talent Group and ICM. Mizuno is repped by United Agents, WME, Goodman Genow, and Wolf Kasteler.

HBO has given “House of the Dragon” a 10-episode order with an eye toward a 2022 debut. Miguel Sapochnik and Ryan Condal will serve as co-showrunners and will also serve as executive producers along with George R. R. Martin and Vince Gerardis. Sara Lee Hess will also serve as writer and executive producer; Rom Schmidt will also executive produce. Sapochnik will direct the pilot and additional episodes. Clare Kilner and Geeta V. Patel will also direct with Greg Yaitanes directing and co-executive producing.

The show is one of several “Game of Thrones” TV projects currently in the works. Variety exclusively reported that a “Tales of Dunk and Egg” series is in early development at HBO, while an animated “Game of Thrones” project is in the works at HBO Max.

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