Being an international child movie star can be a bit trying.

For example, while making the new film Harry Potter And The Order Of The Phoenix, Emma Watson became somewhat cheesed off with the movie's director, who likes to have, on average, 30 takes for each scene.

She asked him if she was "contractually obliged" to repeat her lines so many times. David Yates — perhaps mindful of the fact that this teenager was being paid ￡1million for her performance as Harry's sidekick Hermione — told her that actually, yes, she was.

It was a rare display of attitude from Emma, who is very popular on set and who has close relationships with everyone from her driver, who loves her like his own daughter, to the producer.

"She is genuinely a very popular girl," says a source on the movie. "I never hear people bad-mouthing her, and I've worked with her for seven years."

There was a time when some thought she was haughty and a bit of a madam. But evidently that behaviour has evaporated.

And who could begrudge the 'Potter children' a bit of normal teenage angst, given the pressure of working long days on this preposterously successful movie franchise?

Now, though, the 17-year-old has grown in confidence and blossomed into a stunning young woman. She has worked under four different directors, while managing to gain a stellar clutch of GCSEs (ten A-grades).