Millie Bobby Brown Calls Her Naughty Braless Santa Outfit 'Understated'

Millie Bobby Brown is eyeing up the holiday season as she gets ready for Christmas next month. The actress, 21, ditched her red carpet gowns for a naughty Santa outfit on Instagram ahead of the weekend, showing off her killer figure in a tight red shorts and crop top combo, and with a white faux-fur trim, she was definitely going for a Little Elf vibe. Flashing her curves and taut abs in her belted outfit, Millie featured on her main feed, but also on her Florence by Mills Fashion brand's IG. The post came as promo for the clothing label Millie founded early last year.

Scroll for all the photos. Sitting on a fireplace ledge as she ushered in cozy season, Millie brought the heat in the tiniest red shorts to match her ab-baring crop top.

Showing off her legs while in chunky black boots with a white furry trim, the Stranger Things star added red, white-piped gloves for a real Xmas-themed finish, also wearing a Santa hat atop her head.

In a swipe right, Millie got more interactive, also showing her British sense of sarcasm. Chatting away as she showed off more of her braless two-piece, the brunette said: "What better way to go to bed" on Christmas Eve than "in this cozy modest outfit?" Millie even started laughing at one point, adding a festive "Ho, ho ho!" as she promoted her "really understated outfit." The video showed off a look from Millie Bobby Brown's Softie Seamless collection, one she's already promoted in the second half of 2025.

Millie Bobby Brown is already established in the retail space thanks to her hugely popular Florence by Mills cosmetics brand. In 2024, she branched out, launching Florence by Mills Fashion, which is known for its cute pastels, comfy loungewear, and sundresses.

"For me, fashion has always been ever-evolving. It’s fluid, and I wanted to create something so that girls going through that similar experience have a resource to be able to try innovative new outfits and styles and phases," she told Elle.

Continuing, Mille added: "I wannted 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."

In the above photo, Millie posed with boxed gifts as she showed off her figure in a skimpy crop top and shorts set with a festive motif print. "I need this for Christmas," one fan replied.