These Celebs Shared Their Favorite Childhood Costumes With Us — Including Photos

Harvey Guillén has long been a fan favorite for his role of Guillermo on "What We Do in the Shadows." Most recently, he appeared in "Blue Beetle." As someone who takes on different roles for work, Guillén shared his favorite Halloween transformation, which took place in 2012.

"I grew up in Southern California, so Bob's Big Boy was a staple," he tells POPSUGAR. "It was a treat to get pancakes on Saturday morning there, and I would always stop at the statue up front and make this pose. And as an adult, I said, 'Why not be him for Halloween?' It brought so many memories back with family . . . and now I want that cheeseburger! Ha!"

You may recognize Kim Chi for being a season eight contestant on "RuPaul's Drag Race." She was a barrier breaker on the show, becoming the first Korean American contestant. She also owns the beauty brand KimChi Chic.

Despite all her fabulous looks as a drag queen, you've never seen her quite like this, in a childhood bunny costume. As she tells POPSUGAR, "I've always had a strong affinity for bunnies, since I was born on the year of the rabbit. You could say I was serving hip-hop in this look before it was cool. Just look how hoppy I look — furreal!"

Kylie Cantrall is an actress and musician who will release a new single, "Elastic," on Nov. 15, and she's planning to release her debut album early next year. She recently reflected on her most memorable Halloween costume, which she wore when she was a kindergartener.

"I was obsessed with 'The Little Mermaid' as a kid, so much so that not only did I dress up as Ariel one year for Halloween, but I was caught on occasion wearing the full Ariel getup to school," she tells POPSUGAR. "It wasn't long before my teacher told me that I can't keep showing up to kindergarten in a red wig!"