Writing on his blog, Martin revealed the project's working title is Snow.
Clarke noted in an interview with the BBC that Harington is deeply involved with the project. "He has told me about it," Clarke says. "And I know it exists. It's happening. It's been created by Kit as far as I can understand, so he's in it from the ground up. So what you will be watching, hopefully, if it happens, is certified by Kit Harington."
Martin confirmed Clarke's account: "Yes, it was Kit Harington who brought the idea to us. I cannot tell you the names of the writers/showrunners, since that has not been cleared for release yet … but Kit brought them in too, his own team, and they are terrific."
The author also said he's involved with the creative side. "I am involved, just as I am with [the Thrones prequels in the works] The Hedge Knight and The Sea Snake and Ten Thousand Ships, and all the animated shows," he wrote. "Kit's team have visited me here in Santa Fe and worked with me and my own team of brilliant, talented writer/consultants to hammer out the show."
Clarke, asked about whether she could ever reprise her iconic role as Daenerys Targaryen, replied, "No, I think I'm done."
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Oh, and I didn't include anything about Christie because it's just a generic "I'm open to returning" thing.
