Watch the official trailer for 'Game of Thrones' prequel 'House of the Dragon'
The official trailer for "House of the Dragon" is here.
The new HBO series is a "Game of Thrones" prequel based on George R.R. Martin's "Fire & Blood" series, which is set 200 years before the events of "Game of Thrones" and tells the story of House of Targaryen, the ancestors of Daenerys Targaryen (Emilia Clarke).
MORE: Get your 1st look at 'House of the Dragon,' the 'Game of Thrones' prequel
The trailer for "House of the Dragon" features stars Olivia Cooke as Alicent Hightower, "The Crown" actor Matt Smith as Prince Daemon Targaryen and Steve Toussaint as Lord Corlys Velaryon.
Other stars include Paddy Considine, Fabien Frankel, Eve Best, Sonoya Mizuno, Wil Johnson, John Mcmillan, Savannah Steyn and Theo Nate.
"House of the Dragon" is set to premiere on Aug. 21.
MORE: 'House of the Dragon,' the 'Game of Thrones' prequel, debuts in August
ABC News' Stephen Iervolino contributed to this report.
Watch the official trailer for 'Game of Thrones' prequel 'House of the Dragon' originally appeared on goodmorningamerica.com