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Kate Middleton

Leave it to the Duchess of Cambridge to keep it classy with a simple black bow paired with a wavy low pony.

Image via Neil Mockford/GC Images/Getty

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Lauren Conrad

We're loving the pearl studs and the messy look of Lauren Conrad's balayaged half-up style.

Image via @kristen_ess

Photo 11/16

Margot Robbie

Margot Robbie's take on the hair bow is a little bit punk rock... and for that we give her major props.

Image via JEAN-BAPTISTE LACROIX/AFP/Getty

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Emma Stone

Keep things simple with a black satin ribbon tied around a casual ponytail like Emma Stone.

Image via Eamonn M. McCormack/Getty Images Entertainment/Getty

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Millie Bobby Brown

OK, so you might need to be a "Stranger Things"-aged teenager to pull this look off, but it's still really, really cool.

Image via Steve Granitz/WireImage/Getty