Celebs in sweats: time to embrace the "athleisure" trend -

<p>Track pants, leggings, hoodies, and other wear that combines comfort and style has only become ever more popular among the most stylish elite.&nbsp;</p><p>Athleisure, as the trend is called, is the perfect mix of relaxing and looking good, and it's either the laziest or greatest thing that has ever happened to our wardrobes (or both). Check out this gallery to get some inspiration from the stars who champion casual athletic wear.</p>

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Kim Kardashian - With Kanye West for a husband, it was no surprise Kim K was spotted in Yeezy athleisure wear all the time. She's somehow managed to pair sweatpants with heels and make it look chic.

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Kourtney Kardashian - The eldest Kardashian sister mixed pinstripes into her athleisure ensemble, adding a unique look to her simple crew neck sweater and matching bicycle shorts.

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Kate Middleton - The Duchess of Cambridge donned track pants with a stripe down the sides and an athletic windbreaker on one of her royal visits to the Wimbledon Junior Tennis Initiative at Bond Primary School.

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Justin and Hailey Bieber - The pop singer was spotted in an Oakland Raiders jacket, gray sweats, and socks and sandals, while his wife wore a hoodie and leather pants. They go to a very special church where athleisure is the new “Sunday best.”

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Sofia Richie - The model and socialite rocked up to New York Fashion Week in a white tracksuit and heels.

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Kaley Cuoco - The actress topped off her casual athletic outfit with a pair of Givenchy sport sandals, so you know it's still high fashion.

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Kourtney Kardashian - Kourtney does it again in a white Adidas midriff tee with black lace trim, white jogger sweats, and black heels.

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Jennifer Garner - Walking with her son, the actress chose a sleek black athletic ensemble, topped off with a vest and big shades.

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Olivia Culpo - The former Miss Universe donned aviator spectacles and a cropped black cotton top, along with jogger sweats and black lace-up boots.

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Rihanna - At the pep rally for the launch of her Fenty x Puma collection, RiRi wore wide-legged track pants and a plaid hoodie with a built-in corset. As the saying goes, it's ugly until Rihanna decides it's not.

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Selena Gomez - Selena Gomez was spotted getting her iced coffee fix dressed in a Versace sweatshirt, gray sweats, white trainers, and carrying a Coach bag. Casual was never so expensive!

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Rebel Wilson - What’s red and black with swooshes all over? A coordinated athleisure outfit!

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Naomi Campbell - The world-famous supermodel brought an added level of class to her striped black track pants and high-tops with her elegant white coat.

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Jessica Alba - The actress, business woman, and mother has a lot on her plate, but she knows how to work comfort into her long days with leggings, sneakers, and casual layers.

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Kendall Jenner and Gigi Hadid - The pair stepped out in matching leggings, aviators, and bomber jackets. Do you think it was planned?

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Khloé Kardashian - The youngest Kardashian sister hopped on the athleisure train and paired calf-length leggings with a tied-up black blouse and clear heels.

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Kim Kardashian - Khloé met up with her big sister Kim, who similarly wore calf-length leggings and clear heels, but paired it with a sports bra and a bomber jacket.

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Lisa Rinna - The 'Real Housewives of Beverly Hills' star knows how to add a sense of maturity to her athleisure look, bundled up in a black and gray ensemble.

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Kylie Jenner and Travis Scott - The "are they, are they not" couple looked like the perfect balance between stylish and relaxed, as if they don't care what you think while simultaneously knowing that you think they look cool.

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The Weeknd - The singer stepped out in New York City looking like a dad running Saturday errands, but still somehow very cool.

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Bella Hadid - The young model hopped on the bicycle shorts trend and completed the look with a headband, black sneakers, a light blue sweater, and a Louis Vuitton bag.

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Hailey Bieber - Mrs. Bieber had a bold take on the athleisure look, with a red Adidas coat, bodysuit, track pants, and black stiletto boot heels. Lipstick and athletics!

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Alessandra Ambrosio - The model raises the bar for airport style in her simple white midriff tee, tan track pants, and Louis Vuitton handbag.

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Kourtney Kardashian - This Kardashian loves to stay comfy, and she wore an all-white sweatsuit to grab lunch with her sisters.

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Scott Disick - Scott Disick has a signature brand of comfy which he maintained at New York Fashion Week.

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Sophie Turner - The 'Game of Thrones' actress wore a red long-sleeved top over black bike shorts and white Nike trainers next to her similarly casually dressed hubby, Joe Jonas.

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Joe Jonas and Sophie Turner - Active bottoms, matching sneakers, and matching bags makes this couple the most athleisurely adorable of all.

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Dakota Fanning - The actress wore a burgundy, velour track suit paired with tinted sunglasses for a very laid-back but trendy look.

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Madison Beer - The singer wore a flame-print sweatsuit and white Nike high-tops to run errands.

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Zayn Malik - One of the singer's most recent uniforms appears to be a hoodie topped with a puffer jacket and comfy sweatpants to match.

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Gigi Hadid - Hadid stepped out in red wide-legged Tommy Hilfiger track pants and a thin gray hoodie, topped off with a baseball cap.

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Lily Aldridge - The model looked sleek in a stretchy black ensemble as she was spotted leaving a skin clinic.

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Drake - When he’s not in one of his famed windbreakers, the rapper loves wearing hoodies, puffers, sweatpants, and trainers. Even his cup fits in the athleisure, sporting an Air Jordan logo.

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Chrissy Teigen -

The model stepped out with her family in a black baseball cap, black sports bra, leggings, a leather jacket, and black trainers.

See also: The huge streetwear revival

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