Ashley Olsen glams it up for rare appearance at Golden Globes after-party

Ashley Olsen made a rare public appearance in Los Angeles Sunday night -- and for a good cause!

The 31-year-old fashionista stepped out for Seth Meyers' Golden Globe After-Party at The h.wood Group's Poppy, presented by Beats By Dre: J.T. Brings the Fun, rocking an all-black ensemble in support of the "Time's Up" initiative's blackout, which was in full force on the red carpet at the awards show.

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Olsen styled her ruffled black gown with emerald earrings (one of the most popular trends of the evening!), slingback heels and the movement's official pin, designed as a request from Reese Witherspoon by Nocturnal Animals costume designer Arianne Phillips.

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The former Full House star wasn't the only one rockin' the hue post-Globes, however. Stars like Debra Messing, Kerry Washington and Eva Longoria attended parties in the same outfits they wore during the ceremony, while Molly Sims, Nina Dobrev, Hailey Baldwin and Rowan Blanchard got on board with the dress code following the show.

See more photos of the Olsen twins:

51 PHOTOS
Mary-Kate and Ashley Olsen style transformation
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Mary-Kate and Ashley Olsen style transformation
1991
At five years old, the Olsen twins sport matching floral outfits and frilly socks. 
1992
The Olsen twins stand arm in arm, wearing lacy tiered dresses. 
1993
Hand in hand like true BFFs, the twins wear adorable straw hats and sandals for their day in the sun.
1993
The twin youngsters hit NYC in nautical-inspired looks topped off with adorable red bows.
1994
Mary-Kate and Ashley wear cute as can be adorable floral headpieces.
1995
The twin take to the It Takes Two red carpet wearing matching oriential-inspired floral dresses.
1996
Mary-Kate and Ashley attend the 9th Annual Kids Choice Awards in all black and their favorite: floral.
1998
Mary-Kate and Ashley take their first fashion risk and don shiny suits on the red carpet.
1998
The twins wear complementary red and blue.
1999
The twins (growing up fast!) wear pastels and matching black jackets and purses on the red carpet.
2001
The twins may have stopped matching their clothes, but that doesn't mean they still don't like the same style. The two wear all black as they walk down the red carpet.
2002
And, we're back to matching! The Olsen twins wear complementary black dresses at the Vanity Fair Oscar Party.
2003
The twins show their love for tropical flavor with bright colors and floral patterns.
2003
The twins go for bold eye makeup to complete their red carpet look.
2004
Mary-Kate and Ashley wear their hair long and free.
2004
The twins hit the Kids Choice Awards orange carpet with sun-kissed glow.
2004
The twins are honored with a Star on the Hollywood Walk of Fame in short high heels and flowing dresses.
2004
Fresh faced and smiling, the twins go for loosely fitted dresses.
2005
Mary-Kate and Ashley Olsen begin attending New York Fashion Week, sporting clearly defined and independent styles.
2005
Mary-kate and Ashley attend the amFAR "Cinema Against AIDS" Gala with two radically different hairstyles.
2005
The Olsen twins attend the Met Gala with two looks that couldn't be more different.
2006
Mary-Kate and Ashley Olsen love their flowing sheer dresses.
2006
The twins rock beachy hair, tanned skin, and casual looks at a charity event.
2006
Red lipstick gives the two sisters a pop of color for their dark dresses.
2007
The twins attend New York Fashion Week in full on high-fashion glamour.
2007
Mary-Kate and Ashley go with a smoky eye at the CFDA Fashion Awards
2008
The twins wear oversized dark sunglasses at the Chanel runway show.
2008
With a cutout dress for Ashley and metallic gold for Mary-Kate, the twins are ahead of the trend game at the MET Gala. 
2009
Sunny blonde hair gives the twins a perfect summer glow.
2009
The Olsen twins add a pop of color to their black and white outfits with patterned and bright colored clutches.
2010
The twins don flowing, angelic dresses on the red carpet.
2010
The twins love to pair starkly contrasting black and white in their outfits.
2010
Black on black on black is the twins' high-fashion motto.
2011
Sunglasses inside? The Olsen twins can get away with breaking any style rule they'd like because they still look fabulous.
2011
The twins haven't stopped matching! Their twin purses are as cute as can be.
2012
The twins have never let go of their most iconic look: flowing loose-fitted dresses.
2012
The twins rock chic black sunglasses to complement their all-black outfits.
2012
Who can wear sunglasses inside and get away with it? Mary-Kate and Ashley can wear sunglasses inside and get away with it. 
2012
The twins look more grown up than ever with fully developed and sophisticated personal style.
2013
The twins have lost their indoor sunglasses look, but have returned to their go-to: all-black!
2013
At an Estee Lauder event, sporting bags of their own design. 
2014
Posing in casual attire at the Elizabeth and James fragrance launch event. 
2013
Mary-Kate cozies up to fiancee Olivier Sarkozy. 
2013
Ashley takes Olivier's usual spot at the game. 
2014
Posing on the CFDA red carpet, just before winning their awards for Accessories Designers of the year. 
2014
Looking ultra-chic in Paris. 
2014
Looking regal at the Met Gala. 
2015

Wearing their style uniform: all black, at the CFDA Awards.

(Photo by Jamie McCarthy/WireImage)

2015

Channeling the gothic at the 2015 Met Gala.  

(Photo by Mike Coppola/Getty Images)

2017

Looking ultra chic with their sister Elizabeth.

(Photo by Donato Sardella/Getty Images for InStyle)

2016

Rocking black and gold at the 2016 Met Gala.

(Photo by Taylor Hill/FilmMagic)

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Inside the Golden Globes 2018 After Parties: How the Stars Cut Loose

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Stars Continue to Wear Black at 2018 Golden Globe After-Parties -- See the Looks!

 

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