At the Sunday, Feb. 23 event, the actress, 21, gave her blonde hair its red carpet debut in a sleek braided bun with a single face-framing strand.

Brown opted for a custom Louis Vuitton peach gown with a cowl neckline and open back detail, as well as gold sandals.

The Stranger Things star added some sparkle with Chopard jewels.

She wore earrings featuring two 11-carat brilliant-cut yellow diamonds and 9.71 carats of white diamonds set in 18k gold, as well as a ring featuring a 5.65-carat oval-cut yellow diamond and white diamonds set in 18k yellow gold and 18k white gold, both from the Haute Joaillerie Collection.

While they didn’t walk the red carpet together, Brown was joined by her husband, Jake Bongiovi, who wore a simple black suit and a TAG Heuer timepiece.

Earlier this month, Brown debuted her new blonde hair via Instagram. In a carousel of photos, the actress’ recently dyed platinum locks were styled in face-framing layers.

She also wore a black body-con dress and pointed black heels featuring a metallic buckle.

The star, who turned 21 on Feb. 19, rang in the milestone birthday with another blonde look. In an Instagram video, the Enola Holmes actress rocked fishtail braids and a green bustier-style top.