Williams' character will be appearing in Series 9 episodes The Girl Who Died, written by Jamie Mathieson and Steven Moffat, and The Woman Who Lived, written by Catherine Treganna.
Talking on last night's Alan Carr: Chatty Man, the actress 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.She also spoke about becoming a part of the show:
“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.”
“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.The full interview with Maisie Williams on Channel 4's Alan Carr: Chatty Man is now available to watch online.
“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."
[Source: Doctor Who TV]