'Doctor Who' Season 9 Spoilers: Maisie Williams Joins 2015 Episodes' Cast - 'Game Of Thrones' Arya Stark Actress Shares Excitement

One of the biggest Sci-Fi television shows of all time is about to collide with one of the biggest fantasy series of all time! This week, we learned that Game of Thrones actress Maisie Williams is set to make a guest appearance in at least one of the upcoming season 9 episodes of Doctor Who! This means the Doctor will interact with Arya Stark! The actress, along with showrunner Steven Moffat released statements about this news, so check out more on this below!

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"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," Moffat said in an official press release regarding this casting news. "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."

The executive producer always has a great way of saying something so vague that it gets fans of the series super excited for what's to come. So what do you think Williams' character will bring to the table in the new season?

"I'm so excited to be working on Doctor Who as it's such a big and important part of British Culture," the young actress stated this week, according to UPROXX. "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."

Head over to Slash Film to check out another great photo of Maisie Williams on the set of Doctor Who!

Let us know what you think of this Doctor Who casting news in the comments section below!