The 25 Chicest Women in Fashion in 2015?

Bochert's long, lean, and predominantly black wardrobe is the stuff of punk witch dreams. Regardless of the occasion, the model manages to infuse every outfit—including those she wears on the runway—with a gothic, enchanted vibe.

It's a long road from sitcom star to bona fide fashion icon, but it's a path the Olsen twins, after a few tricky years as NYU coeds, have quietly finessed. Both Ashley and Mary-Kate serve as walking endorsements of their chicly minimalist designs for The Row. (They'd each qualify for inclusion on this list in their own right, but there's something about their joint public appearances, so complementary yet subtly different, that adds to the mystique.) These days they're more likely to accessorize with vintage jewelry than Starbucks latte cups.

Best friend, stylist, and muse to Nicolas Ghesquière, Sauvé has been the envy of fashion insiders since the designer's earliest days at Balenciaga, when she began sporting his fresh-from-the-atelier creations—before they hit the runway. Today, she works side by side with him at Louis Vuitton, and nobody wears his razor-thin flares better.

The Style Bubble blogger's look is a magpie mix of the runways' latest and greatest. Yet, where other street-style pretenders end up resembling fashion car crashes, Lau somehow manages to make it all look weirdly coordinated and even effortless. Dare to emulate her off-the-cuff quirkiness at your own risk.

Over 6 feet tall in flats, Smith-Petersen is a formidable presence on the European fashion scene. Her PR company's list of clients could fill an address book, but whether she's representing Valentino or an on-the-rise label like Au Jour Le Jour, she rarely strays from her uniform of understated suits in shades of black, white, and gray. Many of them are classic Calvin Klein (she worked for the designer in the '90s) and they still look flawless.

Since her days running the downtown boutique Liquid Sky and serving as an inspiration for a young store assistant called Chloë Sevigny, Frey has been a style setter. She knows her way around a pair of great jeans, generally vintage, high-waisted, and light-wash. But the flip side to that boyish denim is a heavy dose of sex appeal, be it in plunging jumpsuits or a curve-hugging leather pencil skirt—and an enviable collection of shades that gives husband Mario Sorrenti's a run for its money.

Nickerson is the rarest of creatures in today's social media world: someone who prefers to operate behind the scenes. Consequently, her work—backstage at brands from Calvin Klein to Alexander McQueen, and in the pages of Vogue, where she is a contributing editor—is much more conspicuous than the stylist herself. But partly because a Nickerson sighting is so rare, her personal look—from the confidently disheveled hair to the confidently disheveled designer clothes—is closely watched. Birkenstocks would never have become a thing if Nickerson hadn't sported her Céline shower slides with rag wool socks everywhere last winter.

Kitten heels, an understated sweater or a simple button-down, a full skirt. Sensible wardrobe staples all, but on longtime Vogue Italia editor in chief Sozzani, they look sensational. Her secret is in her eye for color, whether she's sporting something as subtle as a pair of jewel-toned flats or as dramatic as a sculptural, statement-making coat.

To get a sense of Bidault-Waddington's ineffable Anglo-French cool, consider this: When Marc Jacobs was launching Marc by Marc Jacobs a decade and a half ago, he signed her up to consult and style. In the intervening years, Bidault-Waddington has worked for everyone from Hermès to Chloé and contributed to magazines like Self Service and Purple, but her style—'70s haute bourgeois with a hint of subversion—remains eternal.

Considering Shimizu's start as a face of '90s-era Calvin Klein, perhaps it's no shock that she's spent the intervening years making denim, leather, and, more recently, three-piece suits look so obscenely good. With her winning combo of polish and slouch, the model-turned-model agent is the epitome of unfussy, androgynous ease.

"Very sexy, but very woman, and always with a bit of rock 'n' roll." That's how Roitfeld herself once described her look, and it's perhaps no surprise that her style has served as a blueprint for everyone from Tom Ford at Gucci in the '90s to Kim Kardashian West today. Paris Vogue, which she helmed for a decade, and now CR Fashion Book are essentially made in the editor's kohl-eyed, bare-legged image. These days, she's rocking a post-back-surgery plastic brace, but squint and it could be an Alaïa corset.

Philo's Céline shows are as aspirational as it gets. The label's patent wedges were the must-have shoe in the front row last season. But it's the designer's own pared-down style that every woman in fashion seems to be trying to emulate in one way or another, from the pooling pant hems to the makeup-free face to the Stan Smiths she still wears better than anyone.

What can be said about Miss Moss that hasn't been said already? The spiritual heir to ultimate rock chick Anita Pallenberg, the model has two decades' worth of sartorial hits to her name. From '90s minimalism à la Calvin to the definitive Glastonbury look to louche leopard coats and skinny jeans, the supe's influence can hardly be overstated.

The blond mane, the perceptive pale blue eyes, the willowy 6-foot frame tailor-made for Le Smoking. Is there another editor who inspires as much envy as Vanity Fair France's Mouzat?

The attention De Brauw commands on the catwalk is rivaled only by her perfect street style, seemingly effort-free yet precise. Favoring utilitarian outerwear and plenty of crisp shirting (all topped off by her signature cropped cut), the Dutch beauty is the antidote to ubiquitous off-duty model grunge.

Repossi's spare, elegant style has turned her into an unofficial poster girl for the likes of Céline, Louis Vuitton, and Dior. Nice work if you can get it, but Repossi is more than just street-style fodder. She's behind the agenda-setting ear cuffs and knuckle rings that put her family jewelry business back on the map.

She has sprinkled her exuberant styling magic over various Elles, Vogues, and runways, including those of current partner in crime Jeremy Scott, and Cerf de Dudzeele brings the same irrepressible spirit to her own look. She carries off an all-in, high-low, sportif glam with humor—taste mixed with the right hint of vulgarity—and an almost awe-inspiring ease. She coined the term "poverino" to describe any person or thing that doesn't match her level of joie de vivre, and the best way to describe her style might be "anti-poverino." Or as she has said: "I love the rich bitch."

Designers hire Poiblanc when they want a clean, polished, reduced look. Fashion editor at large at Interview, where she works with her partner, Fabien Baron, Poiblanc is her own best advertisement in her monochrome neutrals and minimal essentials.

Bedeaux cut her teeth assisting the London nightlife icon Judy Blame and there's a bit of that scene's clubby exuberance in her own wardrobe. Bold prints, piles of necklaces, and a drool-worthy assortment of vintage caftans are all hallmarks of the influential stylist's look—and living proof that sometimes more really is more.

Not unlike the fashion and art worlds that she covers in Visionaire, the magazine she founded with James Kaliardos and Stephen Gan more than 20 years ago, Dean's personal style runs to the edgy yet glam. By day, a mix of drapey, casually chic separates, and by night, a headier mix of color, print, and the occasional wild orchid in her trademark slicked-back hair.

Her Milan retail mecca, the now 25-year-old 10 Corso Como, stocks a thrillingly eclectic range of designers. But when it comes to her own wardrobe, Sozzani is known for her devotion to two people: Comme des Garçons' Rei Kawakubo and Azzedine Alaïa. Even if she's almost invariably clad in black from head to toe, her grace and warmth shine through.

The term "muse" barely does Khelfa justice, but it's yet another hat worn by the model-actress-director and Schiaparelli brand ambassador. The French-Algerian beauty has inspired the likes of Jean Pauls Gaultier and Goude, Azzedine Alaïa, and Christian Louboutin, and cuts a silhouette in a tuxedo jacket like no one else. Vive Le Smoking.

Part street, part couture, the intersection of the unlikely is what makes Andelman's style—and her store, Colette—so successful. She sets trends at Paris' decade-old concept shop, but her charmingly curated uniform of full skirts, flats, and the occasional whimsical tee sets her far apart from the trend-obsessed.

The concept of classic American style hasn't had much of a makeover since the days of Carolyn Bessette Kennedy. Enter Samira Nasr and her thoughtful mix of casual and high fashion, best exemplified by the denim jacket she likes to sport with eveningwear. Maybe it's the fact that she's Canadian that gives the Elle fashion director a unique perspective on Americana? Whatever the reason, we're into it.