The Game of Thrones spinoff House of the Dragon had close to 10 million viewers

on Sunday, making it the most watched series debut in HBO

and HBO Max history, according to the network.

The fact that so many 'Game of Thrones' fans came back to Westeros with us last night was great, said Casey Bloys.

"'House of the Dragon' boasts an extraordinarily brilliant cast

and crew who gave their all to the project, and

we're over the moon with the great reception from fans," the producers said.

A precursor to Game of Thrones, House of the Dragon takes place roughly two hundred years before

the events of the latter programme.

It chronicles the tale of the House of Targaryen and is based on the book Fire & Blood.

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