Millie Bobby Brown Enjoys Bikini Workout In High Heels

Millie Bobby Brown is showing off her gym bunny edge in a new photo promoting her 2024-launched clothing line. The Stranger Things star, 21, posted to her Florence by Mills Instagram this month, going all '80s in a colorful workout look that included a skimpy bikini top. Flaunting her fit figure from a treadmill while rocking heels, Millie drew the eye to her curves and toned muscles, but her aim was sales. The British actress kicked off her empire with Florence by Mills cosmetics and is now also founder of Florence by Mills Coffee and her new Florence by Mills Fashion line.

Scroll for the photo. Kicking one leg up a little as she posed from a flimsy, pink-painted treadmill, Millie took things back over three decades as she modeled a hot pink pair of shorts and an open, cropped jacket to match.

Flashing her abs and hints of her cleavage, the actress added pops of black from her bralette, displaying her toned shoulders while wearing black heels with a medium-height stiletto. Upping the '80s vibes even more thanks to her black-and-white socks, Millie wore a black headband, completing her look with her dark hair worn down.

Gazing to the side a little and rolling her eyes upward, Millie wore a neutral, low-key face of makeup, going matte with her foundation while sporting a nude lip color. In a swipe right, she switched to video mode, this time walking slowly on the treadmill as she ditched her heels for more practical black sneakers. Fans also got another treadmill pose, plus a studio shoot moment as Millie modeled her pink two-piece.

In a caption, Florence by Mills Fashion wrote: "Perfect for a workout (or not)....gym later collection is available now." Fans quickly sent Millie approval. "Obsessed with the new collection," one fan wrote, with many others sending heart emoji.

Millie's brand offers cute shorts, jackets, dresses, and basics. In this photo, Millie ushered in warmer months in a look she first modeled last year, posing in a white eyelet sundress with thin straps and a braless finish.

"I wanted to be able to create something that was accessible to my generation, to my demographic so that when they go into a store, they feel like they have that one corner—even if it’s a corner in the back—that they have what they’re looking for, and they’re able to afford it," she told Elle.

"For me, fashion has always been ever-evolving. It’s fluid," Millie added. The Hollywood star is now also making headlines for ushering in her blonde era as fans react both positively and negatively to her new light locks.