Princess Kate has long been a fan of trendy workout brandLululemon, 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 Muchdiscounts.
'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.
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The Lululemon Define Jacket's celebrity fans
Reese Witherspoon shared her own Lululemon Define Jacket on Instagram
Princess Kate and Kim Kardashianaren'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.
