Social media, it's a minefield! Technology is moving so fast right now. Everyone is scrambling around trying to understand what it means to have an avatar, how to live our lives on the internet, what it means for privacy, for citizens of a political universe. I think that we're trying to find rules now, as we speak, and it's difficult. But, like everything, the internet is an incredibly powerful force that needs governing - not to restrict our freedom, but to protect people.

I used to look back at pictures and cringe but actually I'm quite proud that I've had fun with fashion and don't always look perfect. The only regret I have is when I look at something I wore when I was very young and it obviously looks like it belonged to someone else.

I love Karl Lagerfeld. I worship him. I was brought up in Paris, and my mum used to wear a lot of Chanel. I love the brand.

Oh my God, no, no chance, no chance. That [kissing her co-stars]s not in my contract!

You might be thinking who is this Harry Potter girl? And what is she doing up on stage at the UN. It's a good question and trust me I have been asking myself the same thing. I don't know if I am qualified to be here. All I know is that I care about this problem. And I want to make it better.

I don't want other people to decide who I am. I want to decide that for myself.

I can be 100 years old but I will always be proud to say I was in Harry Potter.