'Twilight' stars Kristen Stewart and Taylor Lautner Behind the Scenes EW Photoshoot

Kristen Stewart lies on a beige carpet, surrounded by a mess of pink roses and broken crystal. Her sweater is ripped, revealing a bloody gash on her right arm. It's April in Vancouver, and the New Moon cast is filming Bella Swan's climactic 18th-birthday celebration — the one cut short after an innocent paper cut turns the Cullen family, in one split second, from civilized ''vegetarian'' vampires into six beastly creatures hungry for sweet human blood. Director Chris Weitz wants another take of Edward (Robert Pattinson) fighting off his vampire brother Jasper (Jackson Rathbone), as Stewart lies injured in the background.

This is the third freezing night in a row that the cast has worked until dawn, but that doesn't stop the set from feeling warm and jovial. Pattinson mugs for the movie camera between takes and teases his costar for just lying on the floor in the midst of all the vamp-on-vamp violence. ''Do you want Kristen to give us a little life back there?'' he jokes to the director. Kristen smiles. ''I'm just writhing down here,'' she says. ''A lot of writhing. I writhe really well.''

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