In an era obsessed with trends, few figures have done more to elevate the idea of personal style than Mary-Kate and Ashley Olsen. While fashion cycles continue to accelerate—microtrends anchoring and evaporating in the span of a season—the twins have remained steadfast in their aesthetic convictions, causing the masses to forage and collect the few visuals of them doing just so. Their influence extends far beyond the “Olsen tuck” and oversized sunglasses, or tailored separates. Instead, the Olsens have come to represent something increasingly elusive: dressing with discretion rather than performance or approval. Their unremitting appeal lies in their ability to make fashion feel deeply individual—all the more remarkable given their status as both designers and public figures.

In many ways, the conversation around personal style as we understand it today owes a great deal to the example they have set. Stay true! Be you! Cultivate a self, and the style will follow.

In honor of their birthday, we're revisiting five looks that distill the essence of Olsen style.

Family Jewels

Think back to 2017: What was the eveningwear code at the time? Flapper-inspired gowns, ballgown skirts, and plenty of side cleavage. What makes the Olsen twins stand out from that era is their complete disregard for those conventions. At the Studio in a School Gala, a glittering Manhattan charity benefit, Ashley donned a sweeping black coat paired with an embellished oversized clutch, while Mary-Kate arrived bejeweled in a cobalt silk blazer dress. Channel a similar sensibility with emerald beaded earrings, a silky cropped aubergine jacket, a velvet tassel bag, and a taffeta skirt, for starters.

Tonal Twins

The twins made another public appearance as co-chairs of the Youth America Grand Prix's "Stars of Today Meet the Stars of Tomorrow" gala in New York City, alongside the next generation of ballet talent. They arrived in coordinating—but not matching—monochromatic ensembles, each featuring the unexpected pairing of an evening turtleneck and a sweeping pleated maxi skirt. Mary-Kate opted for head-to-toe neutrals, anchored by a draped kerchief top from The Row's Fall 2018 collection. Ashley, naturally, chose charcoal from top to toe. Recreate the mood with silky blouses and modern skirts in complementary tones.

Staying In Uniform

When the Olsen twins do surface, they do so in looks that break the internet. For black-tie occasions, the pair rarely opt for predictable gowns or classic suiting, instead favoring their signature form of cloaking: floor-length coats worn as the entire outfit. And no Olsen wardrobe would be complete without another enduring staple—the crisp white tuxedo shirt.

Bohemian Rhapsody

Tiers of lace, an embellished party jacket, and a sense of bohemian ease made the Olsen twins' 2017 Met Gala appearance one for the books. This blend of unfussy glamour—complete with tousled tresses and smudged eyeliner—stood in contrast to the evening's theme, which felt entirely true to them. Take note of this eclectic sensibility and find a similar kind of glamour in Bode's twill jacket, Le Sundial's stone earrings, and Isabel Marant's crocheted poncho.

Some Like It Black

As they so often do, the Olsens floated into the 2019 CFDA Fashion Awards shrouded in head-to-toe black, where they accepted their fifth award for The Row. Ashley kept her look monochromatic, accessorizing with a black clutch and matching heels, while Mary-Kate introduced a subtle note of contrast with a turquoise clutch. For your next evening affair, take a cue from the twins with Leset's silk-like collarless coat, Khaite's textured pale-blue clutch, and Toteme's satin blouse.