The $3 Drugstore Beauty Product Hilary Duff Wore On Her Wedding Day

Update: For her late December wedding, Hilary Duff wore her chic blonde bob slicked back in a wet and wavy style, topped with a dainty pearl headband by accessories designer Jennifer Behr. The whole look dripped elegance, which is why we were surprised when Duff's bridal hairstylist, Nikki Lee, revealed her secret to the polished style: baby oil gel.

On Instagram, Lee posted a bridal glam recap post that showed a close-up photo of Duff's sleek wedding-day hair and included a full breakdown of the styling process — and a major drugstore hack. "Fun fact: I styled it with baby oil gel," Lee revealed in the photo's caption.

Considering you can grab a bottle of baby oil at any drugstore for something like $3 and change, this may just be the most affordable bridal beauty hack ever.

Over the weekend, Hilary Duff married longtime boyfriend Matt Koma in an intimate backyard ceremony in L.A. Wearing a custom Jenny Packham draped gown, the bride was every bit as modern and chic as you'd expect, right down to her hairstyle. Eschewing traditional bridal trends, Duff wore her hair in a sleek, almost-wet wavy bob, which she topped with a dainty pearl and crystal-lined headband.

The overall look was structured, clean, and no frills, as Duff explained in a behind-the-scenes dress-fitting video captured by Vogue ahead of the ceremony. Duff worked with longtime stylist and Nine Zero One Salon founder Nikki Lee for a similarly clean hairstyle, which they tailored to the length of the high-neck gown, and added a touch of glamour with pearl-adorned accessories.

“This is my hair for the wedding, which Nikki has executed perfectly,” Duff says in the video, beaming. “I have newly short hair, and I wanted it off my face and back behind my ears, but with a little bit of a wave. It has a little bit of texture, but nothing too curly, and nothing too straight."

To perfect the little details, Lee actually gave the bride-to-be an impromptu haircut on the day of the fitting, so the length of her hair would fall just above the backless gown. “I have a high neck to my dress, and I didn’t want hair bunched up [around the neckline]," Duff explains in the video. "We actually just cut another inch off the back this morning, to make sure it clears the neckline of my gown."

Of course, the pièce de résistance of the hairstyle was the dainty embellished headband, created by accessories designer Jennifer Behr. "I’m going to wear a headpiece that’s very simple and beautiful; it has some little diamonds and pearls on it,” Duff explained, showing off the crystal band.

While her authentic Ines Crystal Pearl headband is not cheap — $225 to be exact — if you're a bride-to-be, the accessory splurge might be worth the price tag, especially if you're forgoing the traditional veil like Hilary Duff.