You can officially knock Maisie Williams' Ashildr out of the running for Doctor Who's next companion.

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Steven Moffat previously told fans that the series wasn't planning on brining back a pre-established character to replace Clara (Jenna Louise Coleman), but if you were still holding out hope for the Game of Thrones star, you can stop hoping. In fact, the immortal Viking isn't planning on returning in any capacity.

"I'm not going to be working on Doctor Who again," she told BANG Showbiz. "Everyone's hyping about it, which is very exciting, but I guess that's more of a publicity thing. But no, I'm not going to return, I have a lot of other really exciting projects lined up instead."

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Doctor Who has yet to settle on a new companion, Moffat promises the next person to enter the TARDIS will give the show a fresh start.

"I'm beginning to have an idea of the kind of person, specific ideas but not a specific actress. A new companion gives us the chance to launch the show again. Moffat said, according to The Radio Times. "You can recruit new viewers when somebody else meets the Doctor. And I think we've got a really cool new idea about how to do that."

Doctor Who will return to the BBC and BBC America on Dec. 25.