Emma Watson Sports Tattoo, Extensions For The Bling Ring, British GQ

Access Hollywood
Emma Watson on the cover of British GQ -- British GQ/Mark Seliger

Emma Watson has a new look - hair extensions and a tattoo on her hip.

But, for anyone worried that Britain's sweetheart has gone for a bad girl style - it's all in the service of her new role in "The Bling Ring" and for the cover of British GQ.

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Emma, 22, best known for playing Hermione in the "Harry Potter" franchise, explained why she's taking on the very adult new role - as Nicki, a teen who (with her friends) robs celebrity homes.

"When I read the script and I realized that essentially it was a meditation on fame and what it's become to our society, I had to do it," Emma told GQ UK.

"The character is everything that I felt strongly against -- she's superficial, materialistic, vain, amoral," she continued. "She's all of these things and I realized that I hated her. How do you play someone you hate? But I found it really interesting and it gave me a whole new insight into what my job, or my role as an actress, could be."

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Emma also told the mag she took the role because it kept her in modern times.

"I was open-minded about doing anything, but the one thing I didn't want to do was get myself into a corset because I was worried I'd never get out again," she told the mag, which released excerpts on its website. "I knew it would be a really comfortable thing to do, but I felt... I had to dive into something really different. This has been a really big departure for me; it's a really big character. That's so exciting for me because it meant I was really acting."

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