Sydney Sweeney in Knit Set
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Sydney Sweeney Just Stole This Cool-Girl Bra Tip From Katie Holmes and Hailey Bieber

 The girls that get it, get it.
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When Katie Holmes wore a matching cashmere bra and cardigan in 2019, the internet went wild. Just like that, she transformed the knit bralette into the ultimate cool-girl top (and also had the power to make the $520 Khaite bra sell out). A few months later, Hailey Bieber paid homage to Holmes and wore her own cashmere bra and pants set. And now, Sydney Sweeney — who is, perhaps, the coolest girl right now, if you ask us — has worn her own monochrome sweater bra and shorts outfit to round out this cool-girl trifecta.

The Euphoria star casually stepped out in a Ralph Lauren wool and cashmere bralette paired with matching shorts, a Brunello Cucinelli overcoat, and chunky Sorel sneakers while walking her dog. While the confusing combo does call into question what exactly is going on with the weather in Los Angeles right now (is it warm? Is it chilly? We can't tell), we're inspired to keep the bra-as-a-shirt trend going, no matter what season it is. 

Sweeney's Ralph Lauren option costs $128, but if you're not quite ready to take that plunge yet, there are plenty of cheaper lookalikes on Amazon. They may not be made out of cashmere, but they'll still give you that cool-girl vibe for less. 

Sydney Sweeney Knit Set Trend
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Shop now: $128; theyes.com

Sydney Sweeney Knit Set Trend
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Shop now: $30; amazon.com

If you're not exactly sure how to pull the look off, the best part about a sweater bralette is that it is inherently sophisticated on its own, so it doesn't need much accessorizing; it can be worn with practically anything and still look luxe (even if it's not from a high-end brand). We love a knit bra under a blazer or cardigan with jeans, but it'll still look cute if you pair it with leggings while you WFH, or even boldly style it over a slip dress for something different.

Ready to replace your entire wardrobe with knit bralettes? (Just kidding, but not really.) Shop more stylish picks from Amazon starting at just $15 below.

Sydney Sweeney Knit Set Trend
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Shop now: $15; amazon.com

Sydney Sweeney Knit Set Trend
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Shop now: $20–$30; amazon.com

Sydney Sweeney Knit Set Trend
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Shop now: $27; amazon.com