Millie Bobby Brown In Plunging Bikini Highlights Curves That 'Are Still Growing'

Millie Bobby Brown is showing off her sizzling curves in a red bikini as she attracts fan comments. The actress, 21, stripped down in a recent Instagram repost, flaunting her cleavage and trim waist while rocking a bold two-piece. Posting her photo while reminding fans of her enviable physique, Millie left little to the imagination in her busty bathing suit, and it looks like some fans still can't come to terms with the fact that she's all grown up. Millie, who began her career as a child and teen star on the TV series Stranger Things, is now married and a mom of one. That said, one user seemed to think that the British sensation is "still growing."

Scroll for the photo. Displaying her abs while lifting her arms to her head, Millie posed in a bathroom, standing near frosted panels while seemingly admiring her reflection in a mirror.

Modeling a ribbed, thin-strapped bikini with underwire cups and a low neckline, Millie upped the ante with her cleavage flash, flaunting her toned tummy and legs while wearing teeny "patch on" bottoms.

Wearing shades, Millie sported her hair down and highlighted, but with both hands on her head, she was fashioning her locks into a ponytail. The Florence by Mills Fashion founder kept her facial expression neutral, pouting slightly while wearing a light layer of makeup.

"So beautiful, babe," one fan replied. "Dammmmn," another said, with a third naughtily saying: "I think they’re still growing." Millie made major headlines last year for stripping down to swimwear on her social media, primarily to promote her OG Florence by Mills cosmetics line.

Millie Bobby Brown regularly offers walkthroughs of her merchandise, with the above photos taken from a video she used to promote Florence by Mills, founded in early 2024. Leaning forward for a revealing moment as she flashed her assets, she modeled a plunging black top, going skintight while wearing cheeky matching briefs.

"I wanted to create really stretchy, soft materials that girls felt comfortable with going to school, going to work, things like that. I want people to feel like they’re wearing pajamas, but they’re able to go outside. That’s what I like. I want to wear pajamas to work," Millie told Elleabout her fashion brand.

Continuing, Millie Bobby Brown added, "Really, to me, it’s about self-confidence. I just want everybody to feel the best they can."

Celebrating the holiday season last month, Millie slipped her curves into this Santa-themed outfit, rocking teeny shorts and a crop top, plus a traditional Santa hat. She even dropped an "elf on a shelf" photo on her Instagram.