Princess Kate has long been a fan of trendy workout brand Lululemon, and was even spotted browsing the shop in London as far back as 2016.
The Princess of Wales's go-to workout jacket is the Lululemon 'Define Luon' style, which she most recently rocked to play rugby in Northern Ireland.
Princess Kate is a major fan of the super soft zip-up, wearing it for the rugby in Northern Ireland, above
And if you want to add the world's most universally cool wardrobe staple to your closet right now, you're in luck - the stylish workout jacket in black is in stock! Plus, you can shop other hues with a discount!
The popular Define jacket, which also has celebrity fans from Reese Witherspoon to Kim Kardashian, features a slim, hip-length fit, soft, breathable fabric and handy pockets, too.
Shop Princess Kate's Lululemon jacket style for less
If you're on the hunt for a bargain, you can also look for other colourways and Define styles with up to 50% off with the Lululemon We Made Too Much discounts.
'Define' jacket, colours & styles will vary, from £74 / $79
"The Define jacket is a smash hit for a reason, it's just so practical and great for layering - especially when we get closer to autumn and winter," says HELLO! Online Director of Lifestyle and Commerce Leanne Bayley. "I've got the Define jacket in a lovely peach hue, and it has really brightened up my workout wardrobe.
"Princess Kate, Kim Kardashian and Reese Witherspoon are all on to a good thing. It's worth noting that the Define jacket - especially in black - rarely goes on sale. Especially since the TikTok Lululemon community have been raving about it. I would advise sizing up by one, if you're looking for a slightly looser fit."
Colours and styles in the sale will vary, and pieces sell out fast, so grab yours ASAP.
The Lululemon Define Jacket's celebrity fans
Reese Witherspoon shared her own Lululemon Define Jacket on Instagram
Princess Kate and Kim Kardashian aren't really known for their similar tastes in fashion - although they both share a love for Dyson supersonic hair dryers, a certain designer tote and yes, the Lululemon Define jacket.
Kim Kardashian has also long been a fan of the workout-wear brand
And Draper James founder Reese Witherspoon also rocked a camo print jacket from the workout wear brand in an Instagram snap.