Millie Bobby Brown Debuted the Coolest Ponytail Trend of the Summer

From the front, Millie Bobby Brown's hair for the premiere of the third season of Stranger Things looked like a sleek, center-parted updo. From the back, it's clear that she just debuted one of the coolest hair trends of the Summer. The actress, who plays Eleven on the Netflix original series, surprised fans with an extralong ponytail with brushed-out waves throughout.

Brown's hairstylist for the look, Bridget Brager, posted a close-up of it on her Instagram with the caption, "Inches for Eleven 🙌🏻 @milliebobbybrown at the #strangerthings premiere." She used the Bio Ionic's GrapheneMX Styling Iron ($269) to create curls in Brown's hair before brushing them out into soft waves.

Check out Brown's hairstyle, ahead.