Cyrus is famous for crazy and elaborate costumes — worn anytime of the year! — so it's surprising to see that as a child, she went for a relatively common Halloween costume: a princess.
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KIM KARDASHIAN WEST
Kardashian West's birthday falls just 10 days before Halloween, so she's always had double the reason to celebrate! For her fourth birthday, she dressed as Minnie Mouse.
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A few years after Kardashian West's snap was taken, she donned a flapper costume and posed with little sister Khloé, who was dressed as a ballerina.
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Though many may be afraid of clowns, who could be scared of Sheeran's adorable Halloween getup?
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Roberts was foreshadowing her future role in American Horror Story: Coven with this witch costume.
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Grande doesn't scare easily: She clearly wasn't phased by big brother Frankie's "scaracter" costume!
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The Teenage Mutant Ninja Turtles were never so adorable.
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GIGI & BELLA HADID
The sisters could have gone as twins for Halloween — their younger selves were nearly identical!
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Heigl went full '80s for this Halloween throwback snap.
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Little Hale is just missing a magic carpet to complete this costume!
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Hale wasn't the only celeb who loved Jasmine — Lohan dressed up as her, too!
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Swift's worn a lot of memorable outfits, but her Teletubbies costume — not to be confused with a "yellow pregnant alien" — may be the best-remembered.
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Why wear one Halloween costume when you can wear two? At least, we have to imagine that's what Wilde thought when she went as a Zombie-Wonder Woman hybrid.
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We saw Higgins's Chicago Cubs pride on his season of The Bachelor, and turns out, the Freeform reality star has a been a longtime Bears fan, too! (Catch Freeform's 13 Nights of Halloween celebration, every night through Oct. 31.)
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We all know the Ben and Lauren: Happily Ever After star grew up to basically be a Disney Princess lookalike, so dressing up as Cinderella as a child was a perfect choice.
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Before she was the ultimate domestic goddess, Stewart was just a cute kid — especially in her Little Bo Peep costume!