Big Dippers.(Kate and Laura Mulleavy)(Brief article)

Byline: EVONNE GAMBRELL Photographed by Autumn de Wilde.

Kate and Laura Mulleavy of superhot label Rodarte make a DIY tie-dye extravaganza.

In the three short years since founding Rodarte, fashion phenoms Kate and Laura Mulleavy have exploded onto the scene with their hyperromantic creations. The fierce fairy-tale frocks have already earned them a CFDA nomination for emerging talent and red-carpet attention from ethereal beauties like Keira Knightley. So when the designers decided that for teen VOGUE' s DIY they would tackle tie-dyethe ultimate hippie uniformit seemed a little, well, far-out. But the sisters see plenty of common ground. "Tie-dye plays with …