"One of the greatest gifts that Jo Rowling and the whole franchise has given (the actors) is that we can really end up making a kid's night just from saying hello," Felton says. "I was 12 when we started shooting; 13 when it came out. I'm 23 now. It's been a long journey.

"You don't see people growing up, not when you're there. It's only when you look back at the films. ... Look at Daniel! He was bloody tiny. My face was like a basketball. But those angelic features seem to have left me," he jokes.

"The very last one's a big old epic, with lots of battles and dragons and goblins. It's going to be operatic. And then it's over," says director David Yates.

"I don't think we ever took it for granted. We'd sometimes joke about what we're going to do when it's all over. We'll never have this amount of resources again. We're going to have to go back into the real world, after living in this bubble."

"The decision to split this into two was purely a creative one. By doing two, there's more detail and more time to engage with the characters in the way that we do," says producer David Heyman. "It allows the audience time to bring themselves to it. The audience has the time to project their own feelings and engage with the characters."

"The last film will be it. It's never going to be like this again. You never take this for granted," Heyman says. "You want to do the end justice, so there's a little bit of anxiety."