Kristen Stewart talks 'Twilight'

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Stewart says she was drawn to the Twilight role not because of the books' ginormous popularity — ''I figured it was a little cult vampire movie with a built-in fan base'' — but because she loved the idea of playing a teenage girl experiencing animal attraction for the first time. ''What I love about the story is that it's about a very logical, pragmatic girl who you think would never get swept into something that has this bizarre power.''

After being cast, Stewart performed a pivotal love scene on Hardwicke's bed with the four leading contenders for the role of Edward, including Robert Pattinson. ''Catherine liked a couple of the guys, and I was like, 'Are you joking? I can't do the movie unless Rob does it,''' Stewart says. ''He got it, and we could, like, see each other.'' As Hardwicke puts it, ''She would have strangled me if I didn't pick him.''

During the shoot, the pair ended up taking the roles — and themselves — a little too seriously. They spent hours deconstructing what it meant to be a vampire, and what it meant to be in love with one. The result: big-time angst, both on screen and off. At one point, the studio began to worry their young stars had mistaken this for a Bergman movie instead of a romantic teen fairy tale. ''We were like, 'We're going to play this real' and the studio was like, 'But it's fun. Lighten up!''' says Stewart, who launches into an imaginary rant at the studio suits: ''You knew what you were getting when you hired actors who aren't Disney kids! We're actually going to consider the characters, and not just smile on our marks, and hope we're in focus.''

Stewart, who was just 17 when she shot the movie, was uncompromising about what she'd allow her character to do and say. ''We had to rewrite and improvise a lot of the most intense scenes, because Kristen will not say something if she doesn't feel good about it,'' recalls Hardwicke. ''Kristen is very tough and she does not tolerate bulls---.'' Stewart just feels like she was doing her job. ''I had some of the corniest lines I've ever had in this film,'' says the actress, who was keen to tone down some of the over-the-top declarations of ''I will die for you!'' love. ''We were so awkward saying those lines. Catherine was like, 'Just feel it and say what comes to you.'''

All this might sound like arrogance in someone else, but after spending time with Stewart, she seems like a genuine rebel spirit looking to do good work. Even now, as Twilight threatens to elevate her to the top of the marquee, she's not that curious about how far fame will take her. She'd prefer to chart her own course. ''Look what I'm doing here in New Orleans,'' she says. Playing a stripper in a film that doesn't yet have distribution. ''I told my agent, 'I'm not doing a big movie after Twilight.''' Because she's got that kind of offhand confidence, it's easy to forget that Stewart's barely old enough to vote. She has an eerie calm about her for someone about to undergo a high dose of sudden celebrity. ''For no real reason,'' she says with a shrug, ''I just feel like it won't be a problem.''

Come back tomorrow for EW's candid interview with Twilight costar Robert Pattinson, and a look at the third of EW's three Twilight Collector's Covers.

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