Bonnie Wright, 13, plays Ginny Weasley in the Harry Potter films.
Newsround Online caught up with her to find out what Ron's little sis thinks about the Prisoner of Azkaban.
How do you feel about Azkaban coming out?
Excited, because it's quite a dark and scary film. It should be good.
Are you going to the premieres?
I'm going to the New York premiere and to the UK premiere as well. I've got two different dresses for them, so that's really nice.
What are your fave scenes?
It's good when Sirius Black comes into the school and sees the Fat Lady. I think my favourite scene overall is in the Leaky Cauldron.
How is this film different?
Mainly because it's so much darker. Also, it's by a new director, so it's different in that way too.
What do you think the public reaction to Azkaban will be?
It will be big, I think. The spiders scene in the last one got lots of attention, and I think people will be scared by this film too. I think people will like it. People shouldn't worry too much, though. It's scary, but it isn't completely and utterly frightening.
What do you think of the new actors?
They have been great. Gary Oldman and Michael Gambon are so good. I really look up to them. They really get into their roles.
How is Alfonso Cuaron different to Chris Columbus?
They are both really nice and great with kids. It's interesting to have a change, but there aren't huge differences.
Have the younger actors changed much?
We're all a bit older, obviously. Everyone's a bit more aware of what to do and getting into the swing of things. I feel more relaxed. Everyone knows each other a bit better. I like them all.
What are you up to now?
I'm concentrating on my school work. My school friends used to ask me lots of questions about the films, but they've got used to me being in them now.
Have you started on Goblet Of Fire yet?
Not yet. I'm starting in July. I'm looking forward to it.
What do you think of Ginny?
Sometimes she's quite shy towards people. She isn't really like me, but there are some similarities.
Which of your scenes are you looking forward to?
It'll be really good in the fourth one, with the quidditch match.