Popsugar Beauty Millie Bobby Brown Millie Bobby Brown Long Ponytail Millie Bobby Brown Debuted the Coolest Ponytail Trend of the Summer July 3, 2019 by Jesa Marie Calaor First Published: July 1, 2019 View On One Page Photo 2 of 4 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Previous Next Start Slideshow Beauty NewsBeauty TrendsCelebrity HairCelebrity BeautyMillie Bobby BrownHair