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OTRC: Emma Watson sports 'tramp stamp' tattoo on 'Bling Ring' set, turns 22

Emma Watson is sporting some new ink - a lower back tattoo known as a "tramp stamp," which appears to be temporary and for her role as a teen burglar in the new Sofia Coppola film "The Bling Ring."

The actress, known best for her role as prim and proper witch Hermione Granger in the "Harry Potter" movies, was recently photographed chilling out on the Los Angeles set of the new flick. The red and black tattoo can be seen on her back as she bends over while sitting down on a lawn chair, as seen in pictures posted on the website of Us Weekly magazine.

Watson also wore what appeared to be brunette hair extensions, as well as Daisy Dukes, a black leather jacket and strappy high-heeled sandals.

"The Bling Ring" is based on the true story of a group of celebrity-obsessed teens who broke into the homes of stars like Lindsay Lohan and Paris Hilton. The reported burglaries were carried out between September 2008 and August 2009. More than $3 million worth of jewelry, designer clothes and accessories were reported stolen from the houses. None of the stars were inside their houses at the time of the burglaries.

In the movie, the "Bling Ring" members use the web to track down the celebrities' whereabouts so they can rob their homes while they are away. Watson plays a girl named Nicki, which is not the name of any of the real-life suspects, although her character is supposed to be based on one of them.

"The "Bling Ring" began filming in March. The movie is set for release in 2013 and also stars Leslie Mann, who portrays her mother, Kirsten Dunst, Bush singer Gavin Rossdale and Taissa Farmiga, the younger sister of actress Vera Farmiga, who is also known for her role as Violet Harmon in the FX series "American Horror Story."

"Filming 'Bling Ring' is going great," Watson said on April 3 on her Facebook page. "It's so amazing to get to play a real character. And I get to be funny! Awesome!"

Watson took time off from shooting the film to attend the 2012 Coachella Valley Music and Arts Festival, where she was photographed getting cozy with her boyfriend, Will Adamowicz, and celebrated her 22nd birthday on Sunday.

"Just enjoyed a birthday feast of Mac N' Cheese, jelly beans and lemonade. Thanks for all the birthday wishes. Much appreciated!! E xx," she Tweeted, adding: "As far as I'm concerned I turned 22 when @flo_tweet sang "What the Water Gave Me" at Coachella x."

(Pictured above: Emma Watson arrives for the Lancome pre-BAFTA cocktail party in London on Feb. 10, 2012. The actress is a spokesmodel for the cosmestics brand. Credit: AP / Jonathan Short)

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