Maisie Williams has spoken a bit about her upcoming Doctor Who guest role in Series 9 episode The Girl Who Died.

Speaking on Alan Carr: Chatty Man [via] she said: “There’s been a lot of speculation about whether she’s like a younger Clara or whether she is a new character completely. I’m not going to tell you which one.

“Whether she is good or bad is up for discussion, I think. She does put the Doctor to the test and it’s sort of a dynamic that we haven’t seen before.”

On being a part of Doctor Who: “It’s wonderful. The set’s amazing. I’m used to being part of Game of Thrones and going into something where you’re a small part of something else. You don’t want to hold anything up because they’ve got such a well-oiled machine going.

“Everyone is so accommodating and lovely and happy to have me. There’s no rivalry that I thought there would be – ‘You’re from Game of Thrones’ and I’m like, ‘You’re from Doctor Who’. They’re really lovely.”