A prequel series to Game of Thrones titled 'House of the Dragon' has been ordered, WarnerMedia has announced. 

The new show in George RR Martin's epic fantasy world will be set 300 years before the events of the television series and based on his book 'Fire and Blood'.

"It's my pleasure to announce today that we are ordering 'House of the Dragon' straight to series for HBO," Casey Bloys, president of programming, told a Los Angeles launch event for its new HBO Max streaming service.

"It tells the story of House Targaryen and the early days of Westeros."

The new series will be executive produced by Martin, Ryan Condal and Miguel Sapochnik, who directed Game of Thrones episodes including Emmy-winning episode 'Battle of the Bastards'.

The final season of Game of Thrones won 12 Emmy awards, including the top prize of best drama series, in September.

No details of the prequel's launch date were announced.

The news came shortly after reports emerged that the premium cable channel had axed another series set in the world created by George RR Martin, starring Naomi Watts.

The story was set thousands of years before the events covered in Game of Thrones.

A pilot episode was shot in Northern Ireland earlier this year.