We tell the stories that we want to tell.

The most important thing is that you have to have the visual effects working for you, instead of you working for the visual effects.

Because actually it's really hard to get things made. It takes years. To fight the fights you inevitably have to fight, even when you've produced Harry Potter, you'd better have the commitment and the passion to knock down walls, not take no for an answer.

I think it's great to see how they've grown up, not just as actors but as people. They're still very much the same kids that I met many years ago. They've grown up and they are funny and wicked and naughty and bright, and I think as actors their work is just getting better and better. They've blossomed.

All we try and do is make the best films we can. If you do that then hopefully the audiences will come, and they have. Everything else is gravy.

I got a few things, because I think the props are so beautiful as much as anything else. The detail of the work is something that one has no idea of.

I look forward to having the time and the opportunity to take on new challenges, but I'm also aware that I've loved every minute of the 'Potter 'experience: to make films for an enthusiastic audience and work with great material.