Millie Bobby Brown has been one busy gal, promoting her debut novel Nineteen Steps, and her first perfume launch, 'Wildly Me' for her beauty brand Florence by Mills. And the looks are serving – with a noticeably different take for each we might add.

In London promoting her book, the actress wore the ultimate Blair Waldorf homage, sporting long dark brown extensions and a preppy white headband, or Alice band as we call them here in England. Just me? Anyway, it's a big switch up from the short bob and shag styles she's been wearing and we're loving it.

Worn with a chic all-white ensemble and giant glasses it was very much giving 'business but make it glam.' It wasn't until we clocked a second long-haired headband look on the London visit that we questioned it may in fact be a handy little headband wig trick.

For those not in the know, a headband makes wigs really quick and easy, as the front hairline is the longest part of an install, and the toughest part to get looking realistic.

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Neil Mockford//Getty Images

Yes, she has her hair in front of the headband in this white look, but that small part could be Millie's own hair with the headband wig starting behind - sneaky eh?

Either way, it's a big change from this adorable ZigZag part spiky bun she wore to promote her fragrance launch in Berlin just days before, in her cute Gen Z beauty babe mode.

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Isa Foltin//Getty Images
Millie in Berlin September 9th

And both are absolute hair envy.

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Elena Chabo
Former Beauty Writer

Elena Chabo is Cosmopolitan UK's former beauty writer, working on everything from buzzy celeb news and trending beauty, to sincere first-person reviews and engaging video content for social media. She also creates meatier features and expert-led how-to guides, for print and online. Her passion for Black beauty, textured hair, and the ways beauty interacts with culture, society, identity and relationships, quickly took over her writing career and led her into beauty journalism. Following an MA in Magazine Journalism in 2017, she cut her teeth across various roles at Stylist Magazine, before taking on a Digital Writer role at Good Housekeeping. It was here that beauty took centre stage and she launched and ran the site's first stand-alone beauty section. Remaining at Hearst, she joined the Cosmo beauty team in 2022. Find her on LinkedIn.