As soon as HBO realized Westeros was the most popular fantasy realm on television, it was only a matter of time before the Game of Thrones spinoff ideas began to circulate. As the series neared its final season, those ideas began shape. Five prequels were reportedly on the table, but in July 2018, four of those got the Red Wedding treatment, with only the "Golden Age of Heroes" approved.
There is already a pilot order for the series. Although the Game of Thrones prequel facts are limited at the moment, there’s still plenty to parse through despite a lack of new Game of Thrones scenes to decipher.
With a pilot on the way and more series apparently in the works, the notion of a prequel series moves far beyond GoT fan theories and now seems like an inevitability. After all, why wouldn’t HBO want to keep cashing in on the world of George R. R. Martin?
October 5, 2021 - HBO Releases The First Official Teaser For 'House of the Dragon'Photo: HBO
After years of reporting, rumor, and build-up, HBO finally gave fans a glimpse of what they can expect from House of the Dragon via the series' first teaser trailer. The highlights? An ominous voiceover, a bit of swordplay, a brief look at the Iron Throne (two centuries before we last saw it), and Matt Smith looking very much at home as a Targaryen.
The prequel series will officially arrive in 2022.
December 11, 2020 - Olivia Cooke, Matt Smith, And Emma D’Arcy Join 'House of the Dragon'Photo: Dr. Who / BBC
For HBO's House of the Dragon prequel series, Deadline reports that Matt Smith will appear as Prince Daemon Targaryen, Olivia Cooke as Alicent Hightower, and Emma D'Arcy as Princess Rhaenyra Targaryen. These three actors will lead the show, along with Paddy Considine (King Viserys Targaryen).
The show will also follow a fifth lead, Lord Corlys Velaryon (AKA the "Sea Snake"), though an official casting has not been announced. It is rumored that Penny Dreadful's Danny Sapani is in the running.
As of this writing, the first 10-episode season of House of the Dragon is still set to debut sometime in 2022, with production beginning in 2021.
In October 2020, Deadline reported that actor Paddy Considine will star as King Viserys Targaryen in House of the Dragon, a prequel series set 300 years before Game of Thrones. The first season will contain 10 episodes and is scheduled to debut in 2022. On its website, HBO notes that writers George R. R. Martin and Ryan Condal are the co-creators on the series, with Miguel Sapochnik and Condal serving as showrunners and executive producers. Deadline offered the following summary for the series:
King Viserys Targaryen [is] chosen by the lords of Westeros to succeed the Old King, Jaehaerys Targaryen, at the Great Council at Harrenhal. A warm, kind and decent man, Viserys only wishes to carry forward his grandfather’s legacy. But good men do not necessarily make for great kings.
While HBO did film a pilot for Bloodmoon, another prequel starring Naomi Watts, the network ultimately decided not to move forward with the project. Of the four Game of Thrones prequel series in development at HBO, House of the Dragon is the only one to get the green light so far.
October 30, 2019 - There Could Be More Krakens, Giants, Direwolves, And Even Ice DragonsPhoto: HBO
Just because dragons might not have a place in the Game of Thrones prequel doesn’t mean other magical creations won’t show up. From George R. R. Martin’s writing in The World of Ice and Fire, fans know giants and direwolves were much more populous in Westeros, so expect to see plenty of them.
More dubious stories include rumors of krakens, leviathans, and even ice dragons, so there could be some outright monsters lurking in Westeros’s long and shadowy history.