Kristen Stewart's stripper role

Kristen Stewart plays a stripper in her new film.

The 'Twilight' star portrays a 16-year-old runaway who gets into erotic dancing and occasional prostitution to earn money in the movie - which premiered at the Sundance Film Festival in Park City, Utah, on Saturday (23.01.10) - and Kristen admits it is a big departure for her.

She said: "My character's not sultry, not sexy. She sort of throws herself into all her moves. I tore myself up doing it."

The 19-year-old actress is seen dancing in platform heels, fishnets, a micro-mini skirt and a bra in one scene and the actress was nervous about shooting the sequence with co-star James Gandolfini.

She added: "The first time I put on all the fishnets I was nervous. I really tried to own it though."

Kristen trained with a professional stripper for two weeks to prepare for the movie and initially wanted to learn the sexy moves covered up.

Speaking to Us Weekly magazine, she said: "I wanted to do it in my clothes. But my trainer was like, 'No, you don't stick to the poll when you do that.' "

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