Stretchy, knit headbands have served a couple of purposes in my lifetime. When I was a tween, the mod look was having a resurgence, so a good chunk of photos from my middle school years feature me wearing them as a trendy accessory. By the time I was in high school, however, they'd been demoted from fashionable to functional, showing up only when I needed to keep my hair off my face for a workout or team practice. The pendulum has clearly been swinging back in the other direction lately, though, with several celebrities wearing them in mod mode again — and Millie Bobby Brown is the latest.

More often than not, recently, Brown has been sporting highlighted, shoulder-length hair, but when she went to London this week to promote her debut novel, Nineteen Steps, she debuted a new look. She was seen leaving a BBC studio on Monday with nearly waist-length, chocolate-brown hair that was parted in the middle and topped off with a white, stretchy headband that matched her monochromatic outfit.

I can tell that Brown was really feeling the headband because later that very same day, she changed her outfit and even switched to a different stretchy headband. This time, with her long hair still parted in the middle, she positioned the headband — a near-perfect match to her hair color — in an ultra-mod way: on her forehead meeting right at the hairline.

Despite how phenomenal she looks in this style, it seems Brown's love for headbands burned bright and fast. By Tuesday, there was nary a head-encircling hair accessory in sight.

But if these three photos prove anything, it's that while her short-lived headband phase may be over, her casual right-hand-wave chapter is still going strong.

More major hair looks:

• Halle Bailey's XXL Ponytail Makes Her Look Five Inches Taller Than She Actually Is

• Have We Ever Seen Taylor Swift in Pigtails Before? Now We Have

• I Swear, Megan Fox Has Never Had Hair as Bold as This "Red Velvet" Bob

Now check out Bailey Sarian's 10-minute beauty routine:

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Originally Appeared on Allure