Shoppers call it a "game-changer"
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Hilary Duff brow gel
Credit: Amazon; Jamie McCarthy/Getty

Between her affinity for vintage-feel Levi’s and insanely comfortable Allbirds sneakers, it’s clear that Hilary Duff’s personal style is worth our attention. And given that her space buns, butterfly clips, and glitter makeup inspired tons of adoring tweens (this writer included) in the early aughts, her beauty routine is still one to follow along with, too.

When it comes to achieving the enviable bold brows that have become something of her signature look, you may be surprised to learn that her secret isn’t a pricey designer formula. Rather, Duff counts on Wunderbrow2’s Wunderbrow Gel to achieve her fluffy and full brows, which you can get on sale on Amazon right now for 21 percent off.

Last month, the Younger star let fans in on her secret while sharing her go-to daytime holiday makeup routine tutorial on Instagram — and it’s been on our radar since.

“It’s so easy. This product is called Wunderbrow. I get it on Amazon. It seems really weird, but I love it. It just makes it easier [because] I love to have a big brow,” Duff said while applying the tinted gel to her brows in a light, feathery motion.

Based on the more than 6,400 perfect five-star ratings Wunderbrow has, it’s clear Duff isn’t the only fan of the waterproof, smudge-proof, and transfer-proof formula. Amazon shoppers say the gel’s natural ‘hair-like’ fibers not only make their brows appear instantly fuller, but keep them looking that way throughout the day, too.

“This product is a game-changer! My eyebrows are completely White and since I color my hair dark brown I was having to use a brow pencil to color them in. After an hour or two many white hairs showed through. I basically had to trim down my brows extremely short for the brow pencil to work,” said one reviewer. “I found this product and basically ‘paint’ it on my now grown-out eyebrows by gently gliding it over the top and the color catches on very easily. And it stays on extremely well.”

Head to Amazon to shop the Duff-approved brow gel that’s sure to cause serious brow envy while it’s still on sale.

Hilary Duff brow gel
Credit: Amazon

Buy It! Wunder2 Wunderbrow Gel, $16.93 (orig. $21.30);