Sunny blonde hair gives the twins a perfect summer glow.
The Olsen twins add a pop of color to their black and white outfits with patterned and bright colored clutches.
The twins don flowing, angelic dresses on the red carpet.
The twins love to pair starkly contrasting black and white in their outfits.
Black on black on black is the twins' high-fashion motto.
Sunglasses inside? The Olsen twins can get away with breaking any style rule they'd like because they still look fabulous.
The twins haven't stopped matching! Their twin purses are as cute as can be.
The twins have never let go of their most iconic look: flowing loose-fitted dresses.
The twins rock chic black sunglasses to complement their all-black outfits.
Who can wear sunglasses inside and get away with it? Mary-Kate and Ashley can wear sunglasses inside and get away with it.
The twins look more grown up than ever with fully developed and sophisticated personal style.
The twins have lost their indoor sunglasses look, but have returned to their go-to: all-black!
At an Estee Lauder event, sporting bags of their own design.
Posing on the CFDA red carpet, just before winning their awards for Accessories Designers of the year.
Posing in casual attire at the Elizabeth and James fragrance launch event.
Looking ultra-chic in Paris.
Mary-Kate cozies up to fiancee Olivier Sarkozy.
Ashley takes Olivier's usual spot at the game.
Looking regal at the Met Gala.
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Kendall Jenner and Kylie Jenner are two names synonymous with great style. We've watched them grow from gawky pre-teens to now, budding style icons. Kendall has been seen on countless high-fashion runway shows from Marc Jacobs to Chanel, while Kylie has a truly unique style all her own.
We wanted to find out from Kendall and Kylie who they thought had great sister style. Of course, they were quick to note that they loved their sister's style: Kim, Khloe, and Kourtney's, but we were surprised to find out they looked up to none other than: Mary Kate and Ashley Olsen.
"We love them because they're always evolving and reinventing themselves as designers. They work together, remain close as sisters and have built so many hugely successful brands together. There's something for everyone. We truly look up to them; we love them!"
Click through the gallery above to see the Olsen twins incredible style transformation.