Never feel guilty about stepping out in your gym-gear for the day because athleisure wear is all the rage and shows no signs of dying down...
'Athleisure' first entered our fashion vacob a few years ago, when a select few stars made a style statement by wearing their yoga gear to go shopping... on purpose. In SS16, the A-list are still loving their sportswear and with designers and high street stores continually adding more sporty pieces to their collections, it's a trend that'll be on our fashion radar for the foreseeable.
Everyone from supermodels to high-end retaillers have adopted the stylish gymwear-with-smart-tailoring look, and we couldn't approve more.
Beyonce's Ivy Park is proof, were it needed, that this is a trend only on the rise. Rita Ora, meanwhile, has her own range with sports giant Adidas, mixing floral prints and kimono influences with classic sportswear shapes.
Nike, Reebok and Adidas were all revealed as some of the most searched brands of 2015 - suggesting that we're all totally into this sporty look. We can almost guarantee they're going to be making an appearance in our Black Friday trainer deals page and will probably get snapped up fast.
For the most time-pressed (or sporty) amongst us, the thought of combining your brunch-wear with your gym clothes and wearing a one-size-fits-all outfit for the day makes perfect sense. But for others, not being able to distinguish between your going-out gear and your running clothes is actually the stuff of nightmares.
But don't worry, as with most fashion spells, finding a happy medium is key, and if you're ever unsure of how to do this look well, you can take your style notes from our A-listers in this gallery who've got athleisure down to a T. There are supermodels who instinctively know how to work the trend, with Gigi and Bella Hadid, Kendall Jenner and Hailey Baldwin all able to sport their sportswear in their own unique way, whatever the occasion. But we also love the way Suki Waterhouse and Rita Ora manage to nail athleisure when attending red carpet events - spaces that used to be reserved for more traditional glam.
First up, Gigi Hadid was spotted out and about in this cool cropped sweater by It-girl favourite Danielle Guizio. We've dug out the exact same style.
Whatever your feelings on the look, let these celebs inspire your casual wardrobe.
Athleisure Gigi Hadid
Click through to see who else is rocking athleisure like a pro...
Kate Middleton
The Duchess of Cambridge donned an America's Cup t-shirts to take to the sea in Portsmouth to support Sir Ben Ainslie on the final day of the Louis Vuitton America's Cup World Series.
Irina Shayk
Irina Shayk leads the charge in showing off her newly acquired Ivy Park hoodie, looking comfy and casual after a day of photoshoots in NYC.
Gigi Hadid
Model-of-the-moment and eternal style inspiration, Gigi Hadid - does this super ever put a sartorial foot wrong? Fully embracing the trend in a head-to-toe athleisure look in the shade of the season, it's easily one of her best looks yet.
Kendall Jenner
Proof, were it needed, of athleisure's sartorial significance came when Chloe showed a full tracksuit on its SS16 runway - and was immediately snapped up by Kendall Jenner. Want to emulate the look? Go for a two-tone, unbranded set and team with heels.
Camilla Belle
Camilla's Tory Sport look sums up everything we love about the athleisure trend. Laid-back yet luxe, it'll take you from yoga to brunch and everywhere in-between.
Selena Gomez
When Kendall's not wearing it, Selena Gomez lives in her Vetements tracksuit. Comfy and as cool as hell - what's not to love?
Gigi Hadid
Take your cue from Gigi and swap your skinny jeans out in favour of a pair of luxe quilted joggers for instant downtime cool. Just add the usual weekend mix of shirt, denim jacket and white trainers.
Cara Delevingne
Off-duty models like Cara have long been athleisure devotees. Striking the balance between comfy and cool, this monochrome get-up is the perfect outfit for travelling in style.
Bella & Gigi Hadid
The poster girls for athleisure, Bella and Gigi Hadid, know exactly how to rock matching tracksuits and crop-tops when out and about in New York City. We love the shine to Bella's outfit too.
Hailey Baldwin
19-year-old Hailey landed her first big modelling contract with Topshop last year and has seen her star continue to rise thanks in part to her impeccable fashion sense. We're a teensy bit in love with this bomber-over-hoodie look...
Rihanna
The queen of dressed-down glam, Rihanna is often spotted in a sports brand or two, and Nike, Adidas and Reebok seem to be her favourites. Here she's paired her show-stopping hair and make-up with some neon trackies and managed to look completely flawless in the process.
Chrissy Teigen
Chrissy knows that comfortable and style are equally important when it comes to rocking a day-time look, that's probs why she's paired her sneakers with a flannel-print shirt and sports bra. We are so copying this look for Sunday brunch.
Suki Waterhouse
Turning heads at the Tommy Hilfiger NYFW show in 2015, Suki demonstrated exactly how to nail the athleisure look at a high-end event, with matching sportswear from head-to-toe.
Rita Ora
After first collaborating with Adidas in 2014, Rita Ora has been spotted rocking the athleisure trend with many of her own pieces. And she's just announced a new Japanese themed sports collection with the brand in 2016, so watch this space for more dressed-down fashion pieces...
Khloe Kardashian
Like her little sister Kendall, Khloe also knows that dressing down can be comprised (in the main part) of potential gym gear. We also need this jacket in our lives.
Kim Kardashian
Kim K can flit seamlessly between super-glam looks on the red carpet, and athleisure wear - both of which flatter her fabulous figure. Here she is rocking all black leggings and a crop.
Jourdan Dunn
Possibly the edgiest athleisure look we've seen thus far, Jourdan goes bold with this Moschino two-piece for a festival in London during the summer of 2015. Kudos to the model for pulling this one off, we think.
Gwen Stefani
Credited with rocking the athleisure trend (before it was popular) as she rose to fame with No Doubt, Gwen has continued to stick with what she knows best. Wearing a matching Adidas tracksuit with her hair pulled back, she looks effortlessly cool - as usual.
Kendall Jenner
Kendall's off-duty dressing style is one we're forever trying to emulate. The model has enjoyed a rapid rise to catwalk fame in the past three years, and with a wardrobe many of us envy, it's easy to see why...
Cara Delevigne
Another supermodel who knows where it's at with the athleisure look, Cara's casual style couldn't be more chilled out. She's pictured here in Los Angeles in 2015.
Gigi Hadid
We couldn't be more enamoured with Gigi's athleisure-wear; the shiny leggings are going to be our next staple for running errands/hitting the gym, and we love how she's paired them with a pop of colour in her sports-top.
Jessica Alba
The model and business owner is often spotted out and about in the perfect combination of gym-wear and smart tailoring. Patterned leggings and bright trainers? We're taking our style notes from you Jessica...
Bella Hadid
If you can't wear your athleisure stuff coming through the airport then where the hell can you wear it? Well everywhere actually, but Bella Hadid is showing us that you can still look chic and smart in leggings and a bomber (much like her sister's fav look).
Rihanna
Rihanna could write the book on athleisure clothes. Here she is in NYC demonstrating how glamorous grey leggings and a crop top can look. Although when you've got a body like hers, it does make things a little easier we guess...
Kate Moss
Dressing down comes easily to Kate, and she's able to work the trainers and sportsbag into a perfectly parred-down look, which she completes with a statement coat.