LONDON: Kristen Stewart feels she has become her 'Twilight Saga' character Bella Swan.

The 19-year-old actress feels "protective" of her big screen alter ego because their lives have progressed in a similar way, Female First reported.

"I feel like Bella has become something that is me, in a weird way. I feel very protective of her," Stewart said.

"Bella and I have been on a similar ride, in that during the second film she matures a bit. She's making these drastic life decisions and she knows what she wants," she added.

"She's got to know herself much better. I think I've done the same thing through this project. It's been a wild ride and there's been a lot of self-evaluation. I've grown a lot, and so has Bella," Stewart said.

The actress also revealed she was "heartbroken" when pictures of the cast, including Robert Pattinson and Taylor Lautner, filming the second movie in the franchise, 'New Moon', were leaked.

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"I was heartbroken when pictures were all over the internet. I didn't want anybody to see certain looks, like Taylor in his wig, because we wanted to surprise people when the movie came out," she added.