SI LifeStyle

Millie Bobby Brown Models Little Ribbed Dress From Her Brand’s Newest Collection: ‘I’m Obsessed’

The actress’s newest piece is a certified must-have.

Bailey Colon

Millie Bobby Brown
Millie Bobby Brown / Carlos Alvarez/Getty Images/Netflix

Millie Bobby Brown is loving a classic summertime staple dress, and we couldn’t agree more.

Minute Media may earn a small commission from your purchase at the following links.

The British actress, whose most film The Electric State premiered on Netflix in March, styled a black bodycon mini dress in an Instagram post from June 19—in celebration of the brand-new Sunset Pier collection from her brand Florence by Mills Fashion.

“This is the night look,” Brown declared as she showed off the new garment. “Look at how versatile it is. I’m obsessed.” She also promoted the piece—the Softie Rib Open Back Mini Dress ($49.95), to be exact—on her Instagram story, calling it her “perfect [little black dress].”

See Brown’s latest Instagram post here.

“I created Florence by Mills Fashion because I felt that there was no fashion line on the market that actually created clothes that were meant to fit me and my friends, instead of us trying to fit into the clothes,” said Brown in 2024. “It is so important to me that each piece of the line allows wearers to express themselves and their individuality and celebrate that. I want everyone who puts on a piece from the line to immediately feel confident and free in their skin.”

Releasing in January 2024, the 21-year-old’s Florence by Mills brand ventured into the fashion space after taking the beauty world by storm and embarking into the coffee sphere. In March 2025, Brown added activewear to the apparel line and, in May, she extended to luggage with a collaboration with DELSEY PARIS.

Brown elaborated on the impact of her brand in an interview with ELLE last year.

“It’s about self-confidence. I just want everybody to feel the best they can,” she said. “And if that’s what Florence gives girls when they’re wearing it, then nobody could have worn that outfit better. Making everyone feel happy and confident, ultimately, that’s what fashion means to me.”

Her newest collection is summertime personified, with breezy mini dresses, comfy tees and mini shorts—among others—to add to your warm-weather wardrobe. Brown styled her mini dress, which also comes in a striped yellow pattern, two ways on her feed.

In one sporty look, the Stranger Things star paired the dress with a cropped back zip-up and sneakers. In another, she added a leather bag, statement heels and skinny black sunnies to elevate the garment for a night out.

Like us, her fanbase is equally obsessed with the new collection.

“The best collection of summer 💜💜💜,” one fan beamed.

“SUMMER WITH FLO FASHION IS THE BEST KIND OF SUMMER 🫶🏻❤️,” another user gushed.

Next. Millie Bobby Brown Is a Bubblegum Goddess in Ab-Flaunting Two-Piece Pink Set. Millie Bobby Brown Is a Bubblegum Goddess in Ab-Flaunting Two-Piece Pink Set. dark

Published |Modified
Bailey Colon
BAILEY COLON

Bailey Colón is a writer on the Breaking and Trending News team for SI Swimsuit. Before joining SI Swimsuit, Colón worked at the National Basketball Association where she served as a founding member of the ‘Starting 5’ newsletter and led editorial operations for the NBA App and dotcom. Colón is particularly passionate about the impact of athletics on popular culture, fashion and media. The New England native has a bachelor’s degree from Marist College in journalism and political science.

Home/Fashion & Beauty