Millie Bobby Brown Sneakily Unveils On-Trend Blonde Bob in Cozy Instagram Video for Her Florence by Mills Brand

Millie Bobby Brown is revealing another hair transformation!

On Tuesday, March 25, Brown, 21, shared a glimpse of what appeared to be a new bob haircut in an Instagram Reel while promoting her Soft Girl Sheer Vanilla Hair and Body Mist from her brand Florence by Mills. 

Brown was seen in the clip shared on the line’s Instagram with wet bleached blonde hair cut above her shoulders as she stood in a bathroom. She then flicked her hair from side to side while spraying the hair mist, which retails for $18, around her before pouting at the camera. 

“Soft & sweet 💗,” the caption read. “Mill’s fave trick is to spray soft girl hair & body mist on wet hair for extra long-lasting scent!”

Brown reposted the Reel on her Instagram Stories, writing, “Soft girl vibes 🎀.”

In another promotional video shared four days earlier on Florence by Mills’ Instagram, Brown was seen sporting long pale pink hair flowing down her back in another hair transformation, paired with a pink top to match and jeans.

The “Stranger Things” star’s newly revealed bob haircut comes after she was seen in recent weeks flaunting long blonde locks while promoting her latest Netflix film, The Electric State.

On Feb. 24, Brown was seen at the Los Angeles premiere of the film modeling a bouffant updo with a sweeping fringe as she posed on the red carpet with her supportive husband, Jake Bongiovi.

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For her 21st birthday earlier that month, Brown posted a video on Instagram of her rocking long bleached blonde hair with fishtail braids as she sat in front of a giant heart-shaped birthday cake.

Brown continued to sport long blonde hair in March at the 2025 BRIT Awards in London and on The Tonight Show Starring Jimmy Fallon. She previously modeled long wavy locks in her natural hair color of light brown in a mirror selfie posted in December 2024. 

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Brown’s hair transformation comes after she recently shared on Instagram that her closet also had a transformation — thanks to the help of her friend Paris Hilton.

The actress revealed that she borrowed the glam chainmail top and skirt she wore on the March 11 episode of The Tonight Show from Hilton, 44, as she thanked her in a post.

“Thx @parishilton for the lewk 💕,” Brown wrote as Hilton replied in the comment section, “That’s hot 🔥🔥🔥.”