01of 401989Full Housecast in 1989.ABC via GettyBefore they became fashion icons, the twin sisters made their acting debut as babies onFull Houseback in 1989.
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1989
Full Housecast in 1989.ABC via Getty

Before they became fashion icons, the twin sisters made their acting debut as babies onFull Houseback in 1989.
02of 401991Ron Galella, Ltd./WireImageThey began experimenting with ruffles and bold prints at a very young age — and were #twinning before #twinning was a thing.
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1991
Ron Galella, Ltd./WireImage

They began experimenting with ruffles and bold prints at a very young age — and were #twinning before #twinning was a thing.
03of 401993They continued theirDouble Troublestyle streak through the years …
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1993

They continued theirDouble Troublestyle streak through the years …
04of 401994… and eventually began to discover their own personal color palettes.
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1994

… and eventually began to discover their own personal color palettes.
05of 401998Coordinating blazers and curled-under bobs werethelook at the launch of their popular book series,The Adventures of Mary-Kate and Ashley.
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1998

Coordinating blazers and curled-under bobs werethelook at the launch of their popular book series,The Adventures of Mary-Kate and Ashley.
06of 401999Jim Smeal/WireImageRaise your hand if you had this haircut in middle school.
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1999
Jim Smeal/WireImage

Raise your hand if you had this haircut in middle school.
07of 401999And accessorized it with clips and bandanas à la Mary-Kate and Ashley inPassport to Paris.
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And accessorized it with clips and bandanas à la Mary-Kate and Ashley inPassport to Paris.
08of 402000GettyRemember their Gameboy Pocket Magic Mystery Mall game? Here they are at the launch.
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2000
Getty

Remember their Gameboy Pocket Magic Mystery Mall game? Here they are at the launch.
09of 402002Steve Granitz/WireImageBy the time they filmedWhen in RomeandGetting There, the sisters had a new look: They grew their dark blonde hair past their shoulders, but still continued to sport matching outfits.
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2002
Steve Granitz/WireImage

By the time they filmedWhen in RomeandGetting There, the sisters had a new look: They grew their dark blonde hair past their shoulders, but still continued to sport matching outfits.
10of 4020042004 was a big year for MK and Ashley, who received their own star on the Hollywood Walk of Fame — making them the youngest celebrities to receive the honor.
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2004

2004 was a big year for MK and Ashley, who received their own star on the Hollywood Walk of Fame — making them the youngest celebrities to receive the honor.
11of 402004Jon Kopaloff/FilmMagicAfter dozens of direct-to-video movies, they made their big-screen movie debut withNew York Minutein 2004.
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Jon Kopaloff/FilmMagic

After dozens of direct-to-video movies, they made their big-screen movie debut withNew York Minutein 2004.
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Mark Mainz/Getty

13of 402005As they got older, fashion became one of their main interests. Here, they made their debut at one of fashion’s biggest events of the year, the Met Gala.
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2005

As they got older, fashion became one of their main interests. Here, they made their debut at one of fashion’s biggest events of the year, the Met Gala.
14of 402006By 2006, they were fashion and beauty icons, as well as major celebrities. Ashley presented an award alongside Snoop Dogg at the Teen Choice Awards.
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2006

By 2006, they were fashion and beauty icons, as well as major celebrities. Ashley presented an award alongside Snoop Dogg at the Teen Choice Awards.
15of 402006Ashley and Mary-Kate Olsen.At the launch party for their doubleTeen Voguecover, which was pasted on bedroom walls across America, the sisters proved they were going inverydifferent sartorial directions.
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Ashley and Mary-Kate Olsen.

At the launch party for their doubleTeen Voguecover, which was pasted on bedroom walls across America, the sisters proved they were going inverydifferent sartorial directions.
16of 402007After debuting their clothing line, The Row, in 2006, the designers presented an award at the 2007 CFDA Awards. They would soon go on to launch their second, more accessible fashion line, Elizabeth and James, later that year.
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2007

After debuting their clothing line, The Row, in 2006, the designers presented an award at the 2007 CFDA Awards. They would soon go on to launch their second, more accessible fashion line, Elizabeth and James, later that year.
17of 402008It became obvious that there would never be a Met Gala red carpet that didn’t have them on it.
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2008

It became obvious that there would never be a Met Gala red carpet that didn’t have them on it.
18of 402009And they became such major fixtures at New York Fashion Week that they bartended for fans at Bergdorf Goodman during Fashion’s Night Out.
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2009

And they became such major fixtures at New York Fashion Week that they bartended for fans at Bergdorf Goodman during Fashion’s Night Out.
19of 402010Ashley and Justin Bartha began dating in 2008. They shot down engagement rumors while dating, and eventually broke up in 2011.
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2010

Ashley and Justin Bartha began dating in 2008. They shot down engagement rumors while dating, and eventually broke up in 2011.
20of 402011At the CFDA Awards, The Row was nominated for the Swarovski Award for Womenswear, and both sisters brought out their vintage best (MK’s Chanel jacket! Ashley’s Manolo Blahnik heels!). They paired the looks with coordinating handbags from The Row.
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2011

At the CFDA Awards, The Row was nominated for the Swarovski Award for Womenswear, and both sisters brought out their vintage best (MK’s Chanel jacket! Ashley’s Manolo Blahnik heels!). They paired the looks with coordinating handbags from The Row.
21of 402012Larry Busacca/GettyThe duo won their first CFDA award for Womenswear Designers of the Year for The Row, and would go on to win the award again in 2015, along with Accessory Designers of the Year in 2014, 2018 and 2019.
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2012
Larry Busacca/Getty

The duo won their first CFDA award for Womenswear Designers of the Year for The Row, and would go on to win the award again in 2015, along with Accessory Designers of the Year in 2014, 2018 and 2019.
22of 402014Marc Piasecki/GCAfter dating for two years, Mary-Kate and Olivier Sarkozy gotengaged in 2014.
22of 40
2014
Marc Piasecki/GC

After dating for two years, Mary-Kate and Olivier Sarkozy gotengaged in 2014.
23of 402016James Devaney/GC ImagesThe couple thentied the knotduring a private ceremony in 2015.
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2016
James Devaney/GC Images

The couple thentied the knotduring a private ceremony in 2015.
24of 402015All-black everything became their signature style, which they showed off at the 2015 Met Gala.
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2015

All-black everything became their signature style, which they showed off at the 2015 Met Gala.
25of 402016A major milestone for the sisters, who have managed to stay off of social media almost entirely, occurred in 2016 when they posted their first-ever public selfie on Sephora’sInstagramaccount. The photo received nearly 76,000 likes.
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A major milestone for the sisters, who have managed to stay off of social media almost entirely, occurred in 2016 when they posted their first-ever public selfie on Sephora’sInstagramaccount. The photo received nearly 76,000 likes.
26of 402016Donato Sardella/GettyThe duo opened their first brick-and-mortar Elizabeth and James store in Los Angeles.
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Donato Sardella/Getty

The duo opened their first brick-and-mortar Elizabeth and James store in Los Angeles.
27of 402017Rob Rich/WENNMary-Kate, an avid equestrian, competed in the Hampton Classic Horseshow, during which her then-husband Olivier Sarkozy and sister Ashley cheered her on.
27of 40
2017
Rob Rich/WENN

Mary-Kate, an avid equestrian, competed in the Hampton Classic Horseshow, during which her then-husband Olivier Sarkozy and sister Ashley cheered her on.
28of 402016Derek Blasberg/InstagramA funny-faced-photo of the sisters is seldom seen, but Derek Blasberg managed to capture this shot of Ashley, Mary-Kate and younger sis Elizabeth — now a star in her own right — at the CFDA Awards.
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Derek Blasberg/Instagram

A funny-faced-photo of the sisters is seldom seen, but Derek Blasberg managed to capture this shot of Ashley, Mary-Kate and younger sis Elizabeth — now a star in her own right — at the CFDA Awards.
29of 402017Splash NewsIn one of the most shocking outfits in Olsen history, Ashley ditched her allover black ensembles and stepped out in a pair of hot pink pants.
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Splash News

In one of the most shocking outfits in Olsen history, Ashley ditched her allover black ensembles and stepped out in a pair of hot pink pants.
30of 402017Andrew H. Walker/WWD/ShutterstockIn 2017, Mary-Kate and Sarkozy made a rare public appearance at an N.Y.C. event …
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Andrew H. Walker/WWD/Shutterstock

In 2017, Mary-Kate and Sarkozy made a rare public appearance at an N.Y.C. event …
31of 402017Jillian Sollazzo/WWD/Shutterstock…and they even showed a bit of PDA during yet a nother night out.
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Jillian Sollazzo/WWD/Shutterstock

…and they even showed a bit of PDA during yet a nother night out.
32of 402018Amy Sussman/WWD/REX/ShutterstockMK and Ashley attended the Met Galadressed according to the evening’s theme, “Heavenly Bodies: Fashion and the Catholic Imagination.” Mary-Kate wore a plunging black belted gown with a beaded necklace, while Ashley sported a red, orange and black kaftan with a beaded necklace and headband.
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2018
Amy Sussman/WWD/REX/Shutterstock

MK and Ashley attended the Met Galadressed according to the evening’s theme, “Heavenly Bodies: Fashion and the Catholic Imagination.” Mary-Kate wore a plunging black belted gown with a beaded necklace, while Ashley sported a red, orange and black kaftan with a beaded necklace and headband.
33of 402018Benjamin Lozovsky/BFA/REX/ShutterstockTo no one’s surprise, their next public appearance, at the Noguchi Museum Spring Benefit, involved matching all-black outfits and their natural, wavy hair texture. Mary-Kate wore a black belted long-sleeve dress with booties, while Ashley sported a black blouse with trousers and her signature slingback heels.
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Benjamin Lozovsky/BFA/REX/Shutterstock

To no one’s surprise, their next public appearance, at the Noguchi Museum Spring Benefit, involved matching all-black outfits and their natural, wavy hair texture. Mary-Kate wore a black belted long-sleeve dress with booties, while Ashley sported a black blouse with trousers and her signature slingback heels.
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2019
NINA PROMMER/EPA-EFE/REX/Shutterstock.

35of 402019Neilson Barnard/GettyAt the most recent Met Gala, the sisters mostly skipped out on the “Camp: Notes on Fashion” theme, staying true to their style in black coordinating vintage Chanel Couture leather looks featuring gold hardware.
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Neilson Barnard/Getty

At the most recent Met Gala, the sisters mostly skipped out on the “Camp: Notes on Fashion” theme, staying true to their style in black coordinating vintage Chanel Couture leather looks featuring gold hardware.
36of 402019ANGELA WEISS/AFP/Getty Images2019 marked the second year in a row The Row won the coveted CFDA award for Accessory Designer of the Year (that’s five total wins over the years, if you’re keeping score). The designers walked the red carpet wearing coordinating all-black ensembles from their label.
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ANGELA WEISS/AFP/Getty Images

2019 marked the second year in a row The Row won the coveted CFDA award for Accessory Designer of the Year (that’s five total wins over the years, if you’re keeping score). The designers walked the red carpet wearing coordinating all-black ensembles from their label.
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They may be famously averse to social media, but they made an exception for a famous fan: Ashley Benson.
Mary-Kate adds, “Super magical and can’t wait to meet you soon.” After, Ashley blows a kiss to the camera.
38of 402019Elizabeth and James, 2.0! Mary-Kate and Ashley celebrated the launch of their line moving to Kohl’s with a rare panel, speaking about the new partnership. The sisters swapped their usual looks for brighter styles from the collection for the occasion.
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Elizabeth and James, 2.0! Mary-Kate and Ashley celebrated the launch of their line moving to Kohl’s with a rare panel, speaking about the new partnership. The sisters swapped their usual looks for brighter styles from the collection for the occasion.
39of 40
2020
Mary-Kate Olsen and Olivier Sarkozy.Amy Graves/WireImage

40of 402021Matt Winkelmeyer/GettyIn September 2021, Ashley made herfirst red carpet appearance in two years, attending the YES 20th Anniversary Celebration at The Maybourne Beverly Hills in California.Ashley attended the event with boyfriend,Louis Eisner, whose father, Eric Eisner, is the founder of YES. For the night out, the designer wore a dark, all-black ensemble, including a black coat, while Louis kept it simple in a black jacket and white dress shirt.That month, the sistersunveiled The Row’s first kids' line, a gender-neutral capsule collection.
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2021
Matt Winkelmeyer/Getty

In September 2021, Ashley made herfirst red carpet appearance in two years, attending the YES 20th Anniversary Celebration at The Maybourne Beverly Hills in California.
Ashley attended the event with boyfriend,Louis Eisner, whose father, Eric Eisner, is the founder of YES. For the night out, the designer wore a dark, all-black ensemble, including a black coat, while Louis kept it simple in a black jacket and white dress shirt.
That month, the sistersunveiled The Row’s first kids' line, a gender-neutral capsule collection.
source: people.com