Emma Watson "felt sick" when she realised she was a Millionaire.

The 20-year-old 'Harry Potter' actress - who was cast to play Hermione Grainger in the wizarding movie franchise when she was just nine years old- was given an allowance of just £50 a week until she was around 17, when her father sat down with her for the "money conversation".

Emma - who has an estimated £20 million fortune - said: "By the third or fourth film, the money was starting to get. serious. I had no idea. "I felt sick, very emotional."

In a bid to cope, she enrolled on a course at Coutts bank to learn how to manage her money properly.

The British star - who is now studying at Brown university In America - recently had her long hair cropped and admitted she had the radical image change as a relation to finally finishing work on the 'Harry Potter' movies, as her contract with the franchise forbade her from cutting her locks, wearing make-up or getting her ears pierced during filming.

She told Britain's Vogue magazine: "For the nine years I was on 'Harry Potter' I was contractually obliged not to cut my hair, not to tan.

"All the normal things girls do, I couldn't. So when I got the chance to change my appearance, this is what I did."