I work with a charity called Donate My Dress. It's got chapters all over the country where you can donate special-occasion dresses. Prom is a big deal when you're 15 years old, and it enables girls who don't have the money to come in and choose something special.

My mom is a Twilight fan as well and she's just as excited because she's read all the books so I think she wants to see it come alive just like anybody else. My parents supported me from the get-go, they are very supportive which a lot of people don't get. I told my dad I got the part before I told anyone else and he cried and he's so proud and he's so excited. I mean he's amazing and I'm so glad that he's going to sit beside me and go through all of that with me.

I kind of started with this foundation, and tried to do all the research I could do for Alice [Cullen], and then every time a [new] director would come in, they have their own artistic take on things and add in new elements. And a lot of times they would ask, "What did you love that you portrayed, and what do you wish that you could show?" So I felt, with each installment, I got the opportunity to add on something. I think she was very - you know, really sweet, [laughs] a little odd in the first installment.

I was really, really, really nervous when I got this role because I did feel it was important to make Alice [Cullen] just as lovable as I read her being on paper and, kind of, full of vitality. In my head she is just this light and breath of fresh air in very dramatic settings - because I feel like we're always extremely dramatic in this film. I wanted people to be able to relate to her.

You can't control the paparazzi. But if you go to Coachella you're going to get photographed. Whereas if you're at home, walking down the street you probably won't. It's something I've learnt to navigate my way around but I try to keep my private life private.

I feel like everyone kind of knew someone, like 6 degrees of separation. In Hollywood that is very common.

That was an amazing time period [ CBGB filming] to transport to during filming - the clothes, the music, the lifestyle - it really helps to get into character when there's so much that changes from the moment you step onto the set.