Millie Bobby Brown Sparkles in Cutout Couture For Her 18th Birthday

Millie Bobby Brown rang in her 18th birthday in couture. The "Stranger Things" actor commanded the spotlight in a strapless sequin gown from Sabina Bilenko Couture's Spring 2022 collection. Dressed by her stylist Michelle Kelly, Brown wore a striking periwinkle frock with a keyhole cutout and high leg slit, which she paired with a matching sheer cape. She kept her accessories minimal, wearing only two sparkly hair clips in her hair.

During the night, the beauty-brand founder changed into two additional looks, also styled by Kelly. After making an entrance in her shimmery number, Brown later stepped out in a bright-blue David Koma set featuring a feather top and miniskirt from the brand's Spring 2022 ready-to-wear collection.

Earlier in the evening, she dressed in a corset from Kristin Mallison layered over a vintage dress from Annie's Ibiza as part of a Barbie and Ken costume with her boyfriend, Jake Bongiovi. Bongiovi and fellow "Stranger Things" cast members Noah Schnapp and Amybeth McNulty were some of the many guests at the actor's big bash.

Usually photographed in more casual ensembles and Converse sneakers, Brown's glamorous looks mark her evolving style as a newly minted 18-year-old. While we've caught glimpses of her in more mature silhouettes and prints for award shows, it's rare to see Brown wearing fancier looks during her down time.

If her birthday outfits are any indication, we can expect more glamour from the "Enola Homes" actor in the future, both on and off the red carpet. Ahead, take a closer look at each of her looks.