2005
Despite the fact that this year's theme was House of Chanel, Mary-Kate and Ashley went for something totally different. Ashley went for a golden dress from Oscar de la Renta, while her sis sported a vintage slip-dress.
2006
Badgley Mischka joined forces with Ashley for this custom ensemble.
2007
Mary-Kate shows a little flair for drama in the feathered Lily Et Cie by Rita Warnick, while Ashley goes for a grecian goddess-inspired look.
2008
Diane Von Furstenberg had the honor of dressing the twins for the Superheroes themed gala.
2009
As a designer in her own right, Ashley showed off a personal design for her label, The Row. And since Mary-Kate has a fondness for all things vintage, she wore a showstopping vintage Christian LaCroix gown.
2011
Alexander McQueen was the honoree of the evening, but the twins chose to stand out in the crowd by wearing ensembles from French labels like Givenchy and Dior. Mary-Kate paid homage to her free spirit in a fiery Givenchy gown, while Ashley went for a regal Dior gown.
2012
Every girl loves a little black dress, even Mary-Kate Olsen. She added extra glamour to the look by making her dress from The Row a floor-length gown.
2013
Bohemian dreams come to mind with these looks, but the theme for 2013 was actually Punk: Chaos to Couture. They accomplished the couture aspect of the event by wearing pieces from Dior, Chanel and Balmain.
2014
The sisters return to their roots with these dark vintage looks. Ashley donned an army-inspired Gianfranco Ferré gown, while Mary-Kate went for an equally masculine look in vintage Chanel.
2015
These vintage looks from John Galliano for Dior truly set the bar for any and all Met Gala looks to come.
2016
These looks don't necessarily evoke a sense of Manus x Machina, but they sure did dazzle on the carpet.
2017
Rather than wearing their typical monochrome ensembles, the former actresses went for looks that seemed to perfectly match the designs from Comme des Garcons's Rei Kawakubo, while also matching their typical tastes.
2018
While the Catholic Church might not approve of these looks, the twins certainly looked heavenly. To achieve the look, the designers combined pieces from their label The Row and vintage items from Paco Rabanne.
2019
Mary-Kate and Ashley stood out in the sea of pink during the Met's "Camp"-themed gala.