Mary-Kate and her sis get playful at the Opening Ceremony party in Japan, rocking costume ears by Maison Michel with their dark getups.
It's a plaid, plaid world for Mary-Kate, visiting the MuchMusic studios in Canada in this belted blue coat and black sandals.
The Olsen twin is really feeling the belted coat, wearing it for the second appearance in a row to promote their Elizabeth and James line in Toronto.
M.K.'s a woman in disguise in a tulle dress, long black coat and Burberry wedges at Burberry Prorsum's Spring 2010 presentation.
Whoa! Is M.K.—in tiered gray Christian Lacroix—at the Costume Institute Gala or on the Sweeney Todd set?
Mix master Mary-Kate checks out the L.A. Hangover premiere in a studded black dress and jacket, Prada slingbacks and rose-colored glasses.
Somebody's wearing color! Mary-Kate throws a loose purple jacket over a belted minidress at the Matthew Williamson for H&M Collection launch party in NYC.
Who else but M.K. (at a Tribeca Film Festival dinner) could pull off this wicked-awesome Nina Ricci dress with strappy heels and a red clutch?
This twin rocked a dark Balmain dress with bold shoulders and neckline detailing at the 2009 Film Independent Spirit Awards.
At a screening of The Curious Case of Benjamin Button in NYC, this fashion icon adds some flavor to her dark outfit with a Louis Vuitton animal-print scarf.
The Full House alum dares to be different in a Missoni dress and Marc Jacobs headband at New Year’s in April: A Fool’s Fete in New York City.
Mary-Kate achieves fabulousness at the Council of Fashion Designers of America Awards in this fresh, sexy and classic floor-length dress of her own creation (from the twins' Elizabeth and James line).
Mary-Kate goes for the '70s goddess look with this blue, batwing-sleeve minidress and snakeskin belt.
There's something sort of cool about Mary-Kate's very stark outfit with dangling crucifix—Hanes meets haute—at the Weeds premiere.
M.K. goes for head-to-toe tortured-artist black at an opening for Vanity Fair and auction house Christie's.
Mary-Kate maintains her eccentric cred in this belted caftan at Calvin Klein's Spring/Summer '08 Party.
At the 7th on Sale AIDS fundraiser in NYC, Mary-Kate looks half-Barbie, half-Bo-Peep—but all M.K. You can't say the girl doesn't have her own distinctive style!
What's twin sis Ashley wearing? Find out in her Fashion Spotlight gallery!