'I'm the worst in my acting class' admits Hollywood's highest paid actress Emma Watson

She's Hollywood's highest paid actress and the star of one of the biggest film franchises of all time.

But Emma Watson has revealed she enrolled in acting classes at her American college.

And in a candid confession, the 20-year-old said: 'I think actually I'm the worst in the class.'

Watson, who plays Hermione Granger in the Harry Potter films, chose acting class during her first year at the exclusive Brown University in Rhode Island.

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She admitted that she was terrified of going back to school following the phenomenal success of the six Harry Potter films that catapulted her to stardom.

Watson was nine years old when she beat out thousands of other hopefuls to land the role of Hermione alongside Daniel Radcliffe as the boy wizard Harry Potter.

With an estimated fortune of £10.5million, Watson was named last year by Vanity Fair magazine as Hollywood's highest paid actress taking home £20million.

She earned more than established stars such as Julia Roberts and Jennifer Aniston thanks to her income from the latest two Potter films, The Deathly Hallows Parts I and II, which will come out in November this year and 2011.

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Watson stunned many in the film business by turning down other acting roles to go back to school last year having achieved straight As in her A-levels.

She confessed that she had second thoughts about college life after arriving in the US.

'It was just awful,' she told this month's Vanity Fair magazine.

'I was like, I must be mad. Why am I doing this?'

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Watson said she quickly settled into college life and was helped after meeting Spaniard Rafael Cebrian, an aspiring rock star, who has become her boyfriend.

She studied European history and took acting classes during her first year.

The actress told the magazine, which features her in a photo spread by celebrated photographer Patrick Demarchelier, that having settled into college life she has never been happier.

She said she was worried her fame - she is also the face of fashion chain Burberry and has a £3million deal with Chanel - would prevent her from having a normal life like other students at the £25,000 a year college.

'I was scared before I came to Brown - that I wasn't going to be allowed to have both a career and a normal life,' she said.

'People would think that I didn't deserve to have both. I was afraid they'd think "You're famous. You're given free handbags. Why should you deserve to be normal?"'

Watson told the magazine she was able to settle at college after being placed with a room-mate who had no interest in Harry Potter.

She said she was born to play Potter's feisty sidekick at Hogwarts School.

'If I'm honest, I was her,' she said. 'I was very keen.I was super-eager to please and be good. And I was always kind of bossy.'

• The full interview is in the June issue of Vanity Fair, on sale now.