'House of the Dragon' Is Coming: Here’s Everything We Know About the 'Game of Thrones' Spinoff

Game of Thrones may have concluded its eight-season run almost three years ago, but the show is gearing up to return this August with an upcoming spinoff called House of the Dragon. The 10-episode prequel series, which will also premiere on HBO, travels back in time—almost two centuries before the events of Game of Thrones— and chronicles the Dance of the Dragons, a brutal civil war fought between rival groups within House Targaryen.

House of the Dragon is based on George R.R. Martin's 2018 fantasy novel Fire & Blood from his A Song of Ice and Fire series. The novel follows multiple generations of the Targaryen family, including the "Conquering Aegon (Daenerys Targaryen's greatest-grandfather-uncle) and his sister-wives, Visenya and Rhaenys, a Holy Blond Trinity of fantasy archetypes: one steady ruler, one imperial warrior, one dreamy explorer," explained TV critic Darren Franich in his review for Entertainment Weekly.

Yep, you read that right. The Targaryens were incestuous long before two Lannister twins tried to steal their thunder. Get ready for a lot more dragons and peroxide blonde hair.

Here's who's starring:

King Viserys Targaryen (Paddy Considine) is the chosen successor of the Old King, Jaehaerys Targaryen, at the Great Council at Harrenhal. Targaryen is described as a good-natured man which is foreboding in Martin's fantasy world because "good men do not necessarily make for great kings." And yes, that name is also shared by his descendant, the brother of Daenerys the Unburnt who received his fatal "crown of gold."

Prince Daemon Targaryen (Matt Smith) is Viserys's younger brother, who is a peerless warrior and a dragonrider.

Princess Rhaenyra Targaryen (Emma D'Arcy) is Viserys and Daemon's sister and a dragonrider herself.

Lord Corlys Velaryon (Steve Toussaint) is the powerful Lord of House Velaryon who is commonly known as "The Sea Snake."

Princess Rhaenys Targaryen (Eve Best) is  Lord Corlys Velaryon's wife and Viserys's cousin.

Otto Hightower (Rhys Ifans) is The Hand of the King.

Alicent Hightower (Olivia Cooke) is Otto's graceful daughter, who is also thought of as "the most comely woman in the Seven Kingdoms."

Ser Criston Cole (Fabien Frankel) is the common-born son of the steward to the Lord of Blackhaven and a skilled swordsman.

Mysaria (Sonoya Mizuno) is an ally of Prince Daemon Targaryen.

Additional cast members include Milly Alcock, Bethany Antonia, Phoebe Campbell, and Emily Carey.

In October, HBO Max released the show's teaser trailer, which did not offer many words except for this cryptic message: "Dreams didn't make us kings. Dragons did."

House of the Dragon debuts on Sunday, August 21 on HBO. Watch the official teaser trailer below: