British actress Maisie Williams, best known for her role as Arya Stark on the HBO fantasy series ‘Game of Thrones’, will guest star in the next season of Doctor Who.

The official Doctor Who Twitter account made the announcement on April 30, stating they were “beyond excited” that Williams would be joining the cast in a guest appearance. Williams was also thrilled with news of the role.

“I’m so excited to be working on Doctor Who as it’s such a big and important part of British culture… I can’t wait to meet the cast and crew and start filming, especially as we’ll be shooting not too far from my home town”.

The Bristol-born 17 year old has been confirmed amongst other guest stars for the new series, such as comedian Rufus Hound and actor Tom Stourton, known for his role in Horrible Histories.

Amongst the excitement of the announcement, the executive producer of the BBC series Steven Moffat nevertheless remained tight-lipped on what William’s role will be.

“We’re thrilled to have Maisie Williams joining us on Doctor Who. It’s not possible to say too much about who or what she’s playing, but she is going to challenge the Doctor in very unexpected ways. This time he might just be out of his depth, and we know Maisie is going to give him exactly the right sort of hell.”

Filming will begin in Autumn where Williams will join recurring actors Peter Capaldi, who plays the Doctor, and Jenna Coleman, who stars as Clara Oswald.