So, we've seen the new trailer for series 9 of Doctor Who. We love it and we've also seen Maisie Williams at the end of the video. Since then, there have been a lot of theories about who she is. Some people say that she's River. Others say she's Susan or even a younger version of Clara. Watch her appearance below in the trailer for season 9:
BUT! In his interview with RadioTimes, Doctor Who show-runner Steven Moffat said that Maisie Williams is a brand new character:
"It's a significant role. We're not throwing her away. We're not getting the star value and doing nothing with it. It's a great part and she's terrific in it. But I would say it will develop in unexpected ways.''
I'm so excited right now because I love Maisie Williams in Game Of Thrones and I can't wait to see her in Doctor Who! He added:
"I think once you see what she's up to in the show you'll appreciate what a clever idea of [writer] Brian Minchin's that was.''
"She's not someone from the Doctor's past." Although he did add a mischievous caveat – "unless I'm lying".
I can't wait to see what Series 9 will have! Well, I guess we all have to wait until 19th Septemeber because that's when the 9th Series of Doctor Who will premiere on BBC One!