37 Times Kendall Jenner and Gigi Hadid Had the Very Best BFF Style

Gigi gave her crop top a sporty spin with Nike sneakers and a lightweight Chanel bag, while Kendall interpreted the trend in an embroidered Andrew Gn jacket and Elizabeth and James sunglasses, finishing her look with an Hermès bag.

Kendall called these metallic Talbot Runhof trousers her "party pants," finishing them off with a graphic t-shirt and furry clutch. Gigi followed close behind in sheer-paneled skinnies and a similar shirt.

While Gigi went '90s on us in a ripped tie-dye shirt, Kendall achieved the perfect "mom" look in high-waisted cranberry trousers. Both ladies wore white low-top sneakers and their go-to sunglasses.

Kendall's strappy Dsquared2 shoes stole the show at the MTV Movie Awards, but Gigi showed the sophisticated way to reveal a lace bra in Versace.

For Gigi's 21st birthday, almost all the supermodels wore chokers, and Kendall showed off her triangle bra from beneath her gilded set. The b-day girl herself stuck with a silk camisole, tight white shorts, and caged thigh-high shoes.

During Paris Fashion Week, Gigi and Kendall swapped hair colors for the Balmain runway show. To celebrate the buzzy catwalk, the duo hit up Olivier Rousteing's annual nightcap party, rocking formfitting looks from the new collection.

Gigi and Kendall stomped around Paris Fashion Week in the coolest looks. While both ladies were wearing furry coats after the Balmain show, Kendall bared her stomach in a crop top, but the duo's booties kept them elevated and chic.

Kendall and Gigi enjoyed the Yeezy show with the entire Kardashian-Jenner family. They kept it casual for the start of Fashion Month, Kendall in a piece designed by Kanye West and Olivier Rousteing and Gigi in a satin slip dress and thick bomber coat.

Kendall and Gigi coordinated their looks, including their matching Alpha Industries bomber jackets and Saint Laurent shoulder bags. Kendall wore David Lerner leggings, while Gigi went the sporty route in Under Armour.

The models partied with Olivier Rousteing and the rest of the fashion set in jet-black outfits. Kendall embellished her bandeau and satin trousers with chunky gold jewels, and Gigi kept it sleek in a leather jacket.

The supermodels kept it casual: Gigi in lightweight, loose shorts, a tank top, and functional black low-tops, and Kendall in a structured David Koma top and loafers.

It was all about showing leg for Gigi and Kendall at the afterparty. Gigi stepped out in a black slit skirt (that's actually a top) from Sally LaPointe and a cutout bodysuit from House of CB that was made for showing off her flawless curves. Meanwhile, Kendall chose a custom Atelier Versace dress.

Gigi walked the carpet in an H&M x Balmain glittering mini, while Kendall wore a long white Calvin Klein maxi dress.

Gigi wore a black button-down crop top, distressed denim, and zippered boots, while Kendall polished up her white button-down with high-rise skinnies, suede boots, and her double-buckle belt.

Gigi's sparkling red number was by Diane von Fürstenberg, and Kendall's mermaid lace-up dress was custom Calvin Klein.

Gigi opted for a crop top coordinate set and strappy heels, while Kendall made a statement in printed pants and a textured tank as they boarded the Chanel cruise.

Kendall wore a long lacy skirt with sheer details and a satin tank, and Gigi sported a peekaboo mesh minidress.

Kendall channeled her inner '70s disco queen and rocked white silk bell-bottoms with a cutout top. Meanwhile, Gigi threw a wool cape over her leather skinnies and finished with taupe heels.

Kendall wore leather pants and a tight-fitting sweater, while Gigi showed off her style in an embroidered cape.

Kendall was all about cream in a fuzzy Y-neck crop top and wrap miniskirt, adding a thick coat when she got cold. Meanwhile, Gigi accessorized her Canadian tuxedo with a red silk scarf, later tying it around her bag.

Gigi's gold sequined dress featured a deep plunging neckline, and Kendall's black luxe-looking jumpsuit was more subtly sexy.

Before the Spring '15 Marc Jacobs show, in which both supermodels walked, Gigi showed up in a white slouchy jumpsuit and strappy flats, while Kendall chose black cropped jeans with an athletic stripe, a leather jacket, and printed loafers.

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Gigi and Kendall roamed the streets during the Fall '15 Fashion Week season in black and white separates. Kendall brought edge to a bell-sleeved sweater with leather leggings, and Gigi rocked a classic pair of white Ash sneakers with trousers and a tee.

It was a shimmering Champagne midi for Gigi and black eyelet trousers for Kendall.

After they walked in the Fall '15 runway show, Kendall and Gigi stepped out to celebrate Balmain in Paris. Kendall opted for a ruffled velvet design, and Gigi slipped into checked cobalt-blue coordinates. Both ladies cinched their waists with superwide belts.

For Spring '16, designer Olivier Rousteing threw his annual dinner before the show. We couldn't decide which supermodel looked sexier — both showed up in strappy sheer looks before they debuted on the runway!

Kendall's perfect purple Calvin Klein dress was worthy of a princess-turned-street style star, and Gigi's crisp, white cutout design showed off her assets, making her look like a total bombshell.

Gigi wore a cool taupe one-shoulder crop top and high-waisted pants, while Kendall's printed jumpsuit gave off gypset vibes.

The models played it casual-cool: Kendall wore her #CaKe graphic tee, and Gigi donned a striped sports bra. Their looks were completed with black leggings and comfortable shoes.

Kendall wore a textured strapless gown by Ulyana Sergeenko, and Gigi took her Versace runway dress straight to the red carpet! Before the party started, Gigi kept warm with the addition of a sleek tuxedo jacket.

Even on a night out, the pair's casual looks are absolutely chic. Kendall rocked red animal-print pants with a vintage band T-shirt and square-toed boots. Gigi wore black flared pants with a loose oversize top and snake-print boots.

Even on a causal night out for dinner, Kendall and Gigi served some major looks. Kendall wore a black leather pants with a black top and an olive green jacket. She accessorized with a Louis Vuitton graffiti purse and gold chain-link earrings. Gigi opted for a chic Diesel Red Tag x A-Cold-Wall* top and vest with EB Denim jeans.

Kendall wore a black Reformation dress with boots and a matching coat with a miniature hot pink Versace bag. Gigi complimented Kendall's look with a printed green and teal outfit with a long coat.