House of Dragon

Game of Thrones prequel House of the Dragon ordered by HBO

House of the Dragon will be set about 300 years before events in the original series, which ended its eight-season run earlier this year.

The announcement came hours after another planned prequel, due to star Naomi Watts, was reportedly cancelled.

Game of Thrones was HBO's most popular series. It won multiple Emmy awards and drew tens of millions of viewers.