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Just two more years to wait then...
HBO President of Programming Casey Bloys suggested the likely air date in a recent interview with Deadline, explaining that the other suggested prequel we'd all heard about, Bloodmoon, starring Naomi Watts, had been shelved because it just didn't "gel".
The pilot of Bloodmoon was created off the back of a script from Jane Goldman, but it wasn't given the green light.
It seems this other suggested prequel may not have worked given that it was set 8000 years(!) before GoT and there was no book already written to base it on.
House of the Dragon however has been given the go ahead on HBO (and we assume it will come to Sky Atlantic in the UK later), which has no actors currently attached. But what we do know is it's set 300 years before Game of Thrones - sounds more manageable.
He told Deadline when asked when it would premiere: "My guess is sometime in 2022". He stressed it was too early to give an exact date.
"They are starting writing," Casey continued, discussing George R.R Martin and Ryan Condal's project.
House of the Dragon will be based on George's book that already exists, which is all about House Targaryen - Daenerys' ancestors.
House of the Dragon was one of four potential spin offs discussed, but it sounds like this is the only one in the works for now.
Casey added to Deadline: "For me for right now, I think getting House of the Dragon on the air will be the number one priority."
"There are no other blinking green lights or anything like that. Sometime down the road who knows, but there are no immediate plans.
"We are all focusing on House of the Dragon."
We're already counting down the days.
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