JK Rowling wished James S Potter (Harry Potter’s son) a happy first day at Hogwarts and it was retweeted 120,000 times. The world of Harry continues to grow.
Daniel Radcliffe: It is not an active part of my life any more but it is so funny how often it comes up. I was walking down the street yesterday, eavesdropping for about five minutes as a six-year-old kid pestered his mum about when he could watch Harry Potter. She said it was too scary.

And a young girl was reading one of the books for the entirety of my flight back from America. It was like the Dead Sea Scrolls. The spine was broken, the pages were scuffed, it was so well-loved. If you created that world, it would be fun to be able to play in it and reimagine it.

There is such a yearning to go back into that world. It is great Jo is doing the Fantastic Beasts film. It is a testament to how successful our films were at mattering in people’s lives.

Victor Frankenstein (out in October)
If you’re a Sherlock fan, this is the perfect film for you. Everybody’s there. Andrew Scott plays another very dark character – his eyes look like black whirlpools on camera, yet he is a really sunny, nice guy. He is phenomenal, and James McAvoy was great fun to work with.

Swiss Army Man (completed)
Hands down the weirdest thing I’ve ever done. So bizarre. A guy has run off into the woods and finds a dead body, who he becomes best friends with. I’ve just finished – and it could be one of the best things I ever do.

Imperium (filming now)
I’m about to shoot this. Daniel Ragussis wrote it with a former FBI agent. It is about a guy who goes undercover with a terrorist group. A lot of movies introduce a character as smart but when it goes wrong solve the problems by them turning into Jason Bourne. But if you are undercover and you fire a gun, you’re probably the worst agent ever.

Young Americans (shooting is to start by the end of the year)
I still call this film College Republicans. Young Americans makes me think of the David Bowie song. I have been working on it with John Krokidas for two years. I play Lee Atwater, who advised President Reagan. He did a reprehensible thing, a lot of people really hate him, but my God he was so charming.

Brooklyn Bridge (next year’s big project – with Ben Kingsley)
We are making a film about a bridge, so it can be hard to raise the money. But it is really about the people who built Brooklyn Bridge, and it is one of the most extraordinary, inspirational and terrifying tales you can imagine.