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Nikki Reed, Ashley Greene

Dimitrios Kambouris/WireImage

It's sexy vampire fashion face-off time!

Last night, Breaking Dawn: Part 1 costars Nikki Reed and Ashley Greene cozied up at their flick's New York City screening. And it turns out the actresses had the same idea when it came to their red carpet style.

Both ladies rocked sleek, cutout gowns with thigh-high slits, but who looked better?

You couldn't miss newlywed Nikki in her insanely bright, lime-green and black Michael Kors gown with a revealing open back. Rosalie Hale's alter ego added a slick, side-parted bun and bright red lips to her look.

Meanwhile, Ash vamped it up in a black-and-white single-sleeve Donna Karan gown with a draped skirt and peekaboo cutouts. She wore her glossy, stick-straight locks down, her makeup natural-looking, and added gorgeous drop earrings.

Both actresses look fabulous—Nikki's bold color is hot, while Ashley's winning with her hair and makeup—but which vampire wins this style showdown?

Weigh in below!