ASHLEY AND MARY-KATE OLSEN

ASHLEY AND MARY-KATE OLSEN

Like death and taxes, you can always count on the designer twins to arrive at a fancy-schmancy fashion event in loose-fitting black dresses, plus black accessories, center-parted dos and close-lipped smiles.

From: Last Night's Look: Love It or Leave It?

1 of 50 Larry Busacca/Getty
ASHLEY AND MARY-KATE OLSEN

ASHLEY AND MARY-KATE OLSEN

Like death and taxes, you can always count on the designer twins to arrive at a fancy-schmancy fashion event in loose-fitting black dresses, plus black accessories, center-parted dos and close-lipped smiles.

From: CFDA Fashion Awards: What the Stars Wore

2 of 50 Larry Busacca/Getty
MARY-KATE & ASHLEY OLSEN

MARY-KATE & ASHLEY OLSEN

The hardworking design duo may helm a host of successful lines including Elizabeth & James and Olsenboye, but their high-end line, The Row, has been growing steadily for four years. Recently adding accessories and menswear to the collection, The Row's simple aesthetic has gained traction among A-listers. Their latest fashion foray? The perfect affordable T-shirt!

From: Fashion Week Guide: Star Designers You Must Know

5 of 50 George Pimentel/WireImage
PEACH SHADOW

PEACH SHADOW

We know that after you test out Blake's rosy eye shadow, you'll be a light-shadow convert. Next up on your beauty to-do list should be to try a pale-orangey tone on your lids and just below your lower lash line, just as Ashley Olsen does.

From: 7 Star Beauty Trends on Our Radar Right Now

6 of 50 Gregory Pace/BEImages
ASHLEY OLSEN

ASHLEY OLSEN

There are few people who can get away with wearing a slouchy sweater over a basic white tee with a silk skirt to an event as formal as the Fashion Fund Finalists Celebration in N.Y.C. Ashley is one of them.

From: Last Night's Look: Love It or Leave It?

7 of 50 MediaPunch Inc/Rex USA
ASHLEY OLSEN

ASHLEY OLSEN

Yes, the star is sporting a classic black coat, a croc bag, patent slingbacks and a stack of gold bangles. But what we really need to discuss is that anklet (yes, anklet) she's wearing to the Club Monaco event in N.Y.C.

From: Last Night's Look: Love It or Leave It?

8 of 50 Desiree Navarro/WireImage
MARY-KATE & ASHLEY OLSEN

MARY-KATE & ASHLEY OLSEN

These two definitely have their red-carpet M.O. down: all black, a close stance and a whole lotta 'tude. They keep it up at the Lexus event in N.Y.C. in fairly nondescript looks, plus funky shoes: cutout booties on M.K. and ankle-tie pumps on Ashley.

From: Last Night's Look: Love It or Leave It?

9 of 50 Taylor Hill/Getty
MARY-KATE AND ASHLEY OLSEN

MARY-KATE AND ASHLEY OLSEN

Our inner Full House fangirls geek out when the sisters go all "twinsie" on the red carpet. Allover black with a touch of gray (via a tee and a printed scarf), low heels with a pointy toe and wavy center-parted hair is their uniform for the launch of Bik Bok in Oslo.

From: Last Night's Look: Love It or Leave It?

11 of 50 FameFlynet
ASHLEY OLSEN

ASHLEY OLSEN

Always one to push the envelope when it comes to her outfit choices, Ashley chooses a bright red vintage caftan with gold embellishments, an Hermès bag and oversize sunglasses by The Row at the Veuve Clicquot Polo Classic in Jersey City, N.J.

From: Last Night's Look: Love It or Leave It?

13 of 50 Amanda Schwab/Startraks
OUT IN FRONT

OUT IN FRONT

Keeping an eye on the competition? Ashley Olsen – who heads several of her own clothing lines – joins former French Vogue editor Carine Roitfeld in the front row at the H&M runway show Wednesday during Paris Fashion Week.

From: Star Tracks: Thursday, February 28, 2013

15 of 50 Stephane Cardinale/People Avenue/Corbis
ELIZABETH AND JAMES PRESENTATION

ELIZABETH AND JAMES PRESENTATION

Ashley and Mary-Kate greet their biggest fan – little sis Elizabeth, wearing their design, – at the presentation of the twins' line Elizabeth and James at N.Y.C.'s Hotel Americano.

From: New York Fashion Week: An Olsen Convention

17 of 50 Eric Reichbaum/Everett
ASHLEY OLSEN

ASHLEY OLSEN

Lest you doubt the power of one transformative accessory, witness how Ashley upgrades her oversize sweater, casual pants and floppy sandals with a simple, dramatic golden cuff.

From: Celeb-Worthy Bling for a Bargain

19 of 50 Pacific Coast News
ASHLEY AND MARY-KATE OLSEN

ASHLEY AND MARY-KATE OLSEN

As the anniversary of their classic TV movie Double Double Toil and Trouble approaches, the sisters mark another milestone: receiving the WSJ. magazine "Innovator of the Year" award in N.Y.C. in coordinating silky neutral looks, plus statement bags.

From: Last Night's Look: Love It or Leave It?

20 of 50 Anthony Behar/Sipa
IT TAKES TWO

IT TAKES TWO

Mary-Kate and Ashley Olsen stick together at WSJ. magazine's Innovator of the Year Awards in New York City's Museum of Modern Art on Thursday, where they were honored for their contributions to the American fashion industry.

From: Star Tracks: Friday, October 19, 2012

21 of 50 Neil Rasmus/BFAnyc/Sipa USA
ASHLEY AND MARY-KATE OLSEN

ASHLEY AND MARY-KATE OLSEN

The Olsen fashion empire is also beloved by industry insiders. Their Elizabeth and James line is casually, effortlessly cool, while their more upscale sister line, The Row, is comprised of carefully edited, minimalist chic pieces (which have already gotten the seal of approval from little sis Elizabeth).

From: Star Designers with Looks You'll Love

23 of 50 Cindy Ord/Getty
ASHLEY LOVES FRANCISCO

ASHLEY LOVES FRANCISCO

When it came to launching her now wildly successful line, The Row, Ashley Olsen looked to Calvin Klein's creative director Francisco Costa for inspiration. "When I first moved to New York, he's the guy that really captured my eye. I followed [his work]," she revealed to PEOPLE.

From: Fashion Friends: Stars and the Designers They Love

24 of 50 David Miller/Abaca
ASHLEY OLSEN

ASHLEY OLSEN

While she tends to cover up with swaths of fabric and fur, Ashley deviates from her norm and reveals a toned bod (and beautiful smile!) while frolicking in the Hawaiian waves. And natch, she lends her personal style to the bikini, mixing a zigzag top and solid black bottoms.

From: Stars' Favorite Swimwear for Less!

25 of 50 Derek Shook/Splash News Online
<em>FULL HOUSE</em>

FULL HOUSE

Watch a clip
In November 2010, 15 years after Full House ended its run, Mary-Kate Olsen and Ashley Olsen proved they were still Daddy's girls when they attended a benefit thrown by TV pop Bob Saget. Afterward, Saget said he was overwhelmed to have them show their support, adding, "The joke I have with them is that I diapered them. They were 3 months old and doing the show, and I also had a baby, and there was a time when I knew how to diaper them really quickly. Of course, I had permission."

From: TV Stars Reunited!

29 of 50 Eugene Mim/PatrickMcMullan/Sipa; Inset: ABC/Getty
ASHLEY OLSEN

ASHLEY OLSEN

The designer's mix of camel outerwear and slim-cut black separates is a study in chic neutrals at a Santa Monica Museum of Art gala.

From: Last Night's Look: Hit or Miss?

30 of 50 Jordan Strauss/WireImage
ASHLEY & MARY-KATE OLSEN

ASHLEY & MARY-KATE OLSEN

The designing duo have it made in their shades, wearing similar styles to take in the J. Mendel show. If they're nervous about their The Row show tomorrow, they're not letting on!

From: New York Fall 2012: Day 8

32 of 50 Stephen Lovekin/Getty
ASHLEY OLSEN

ASHLEY OLSEN

Staying true to her sophisticated but laid-back style, the designer pairs a textured T-shirt with cigarette trousers, bejeweled Manolo Blahniks and a sleek carryall by The Row for a JCPenney event in N.Y.C.

From: Last Night's Look: Hit or Miss?

34 of 50 Kevin Mazur/Getty
EARNEST SEWN JEANS

EARNEST SEWN JEANS

Ashley Olsen's custom-fit Earnest Sewn jeans provide the perfect cool, crisp contrast to her more bohemian tops and accessories.

From: I Really Love My ...

35 of 50 Abaca; Jamie McCarthy/Wireimage; David Tonnessen/Pacific Coast News
SHEER SKIRTS

SHEER SKIRTS

Playing a game of fashion peekaboo, Mary-Kate and Ashley Olsen subtly show off their legs – and a fresh look – in sheer skirts that allow for some fun with hemlines.

From: 12 Hottest Trends for 2012

36 of 50 Doug Peters/Landov
ASHLEY OLSEN

ASHLEY OLSEN

The fashion plate (and creative mastermind behind those sunglasses Greene wears) stashes her workout essentials in a luxe $4,750 doctor bag from her other lucrative line, The Row, which carries a four-figure price tag.

From: Stars' Gym Gear Splurges – for Less!

37 of 50 X17online
MARY-KATE AND ASHLEY OLSEN: THE HUDSON TEE

MARY-KATE AND ASHLEY OLSEN: THE HUDSON TEE

Friends of the fashionable twins are in luck because they might just be receiving T-shirts from the sisters' new line, created exclusively for StyleMint.com. This color-block, long-sleeve top has a luxe look and high quality that makes the price tag seem like it could be missing a zero.

From: Best Celeb-Approved Gifts to Buy Right Now!

38 of 50 Billy Farrell/BFAnyc.com/Sipa; Courtesy Opensky.com
PRADA SUNGLASSES

PRADA SUNGLASSES

Leave it to Ashley Olsen to shade her eyes in haute style, wearing her glamorous curlicue-frame "Minimal Baroque" Prada shades for mundane tasks like walking Fido and running errands.

From: I Really Love My ...

39 of 50 INF; Freddie Baez/Startraks; Wagner Az/Pacific Coast News
AHSLEY OLSEN'S MULES

AHSLEY OLSEN'S MULES

I love Ashley's unique style! Where oh where did she get those fabulous embellished heels? – Miriam
Olsen expertly anchors downtown-ready separates with $995 Manolo Blahnik "Rosalia" velvet mules (not available online; call 212-582-3007).
More You Asked, We Found: Star Looks >

From: You Asked, We Found: Star Looks

40 of 50 D Dipasupil/Getty
BLAZERS AND MAXIS

BLAZERS AND MAXIS

Mixing bohemian chic with business casual, Ashley Olsen, Maggie Gyllenhaal and Rachel Zoe finish off their flowy dresses with tailored toppers.

From: Would You Wear These Trends?

41 of 50 Justin Campbell/Startraks; Dimitrios Kambouris/Getty; Humberto Carreno/Startraks
THE OLSENS

THE OLSENS

MARY-KATE, ELIZABETH & ASHLEY
The Olsens were once synonymous with twosome – until kid sis Elizabeth stepped out with an Oscar-worthy performance in Martha Marcy May Marlene. "They're really important in my life," Elizabeth, 22, told USA Today of her famous older twin siblings. "I feel like they've taken care of me my whole life."

From: Hollywood's All in the Family Year!

42 of 50 Billy Farrell/Sipa
CLASSIC CARRYALL

CLASSIC CARRYALL

Mary-Kate and Ashley Olsen often hit the town accompanied by a handbag from their high-end collection, The Row – Ashley's design, made from luxe leather and skins, is a handcrafted investment piece.

From: Spoil Yourself Like a Star

43 of 50 Larry Busacca/Getty
ASHLEY OLSEN

ASHLEY OLSEN

The mini mogul goes for deconstructed suiting, pairing a gauzy blouse with tailored separates, embellished flats and a doctor bag by The Row for the 2011 Cool Comedy event in N.Y.C.

From: Last Night's Look: Hit or Miss?

44 of 50 D Dipasupil/Getty
MARY-KATE AND ASHLEY OLSEN

MARY-KATE AND ASHLEY OLSEN

The Olsens bare a little skin in the front row of Kanye West's runway debut, wearing their signature black styles with strappy sandals and matching unkempt locks.

From: Paris Spring 2012: Nicole & Joel's Date Night

49 of 50 Pascal Le Segretain/Getty