Of course, there has been a lot of gossip about a tendresse between her and Radcliffe, but this is always denied.

Daniel once said that they don't speak or text when they aren't filming Potter, and in an unguarded moment confessed that he found her pretty annoying at times.

"It's fair to say that Emma and me have had our moments, but when you are with someone for six years, and you see them practically every day, there are bound to be moments when you just irritate each other," he said.

They are, though, on good terms now, and at the party after the Leicester Square premiere last week spent quite a long time chatting and joking.

When Radcliffe admitted that his female fans were kissing his new waxwork at Madame Tussauds and suggested that the girls should "come and get a taste of the real deal", Emma said she would not be taking up the offer: "Oh no! I've known him far too long. He's more like a brother to me."

As for life after Harry Potter, she has said: "I'll feel a bit lost when it all finishes, I guess. It's made up such a big part of my life and dominated so much time.

"It's restricting — long hours, and I miss my family a lot — but if I had the chance to do it again in a million years, I would say yes."