Of course, you'll need an outfit inspired by Harley Quinn for your Halloween costume, but nailing the look is all about makeup. You can find some inspiration for your Harley Quinn makeup on Instagram, Pinterest, and TikTok. The primary focus of your Harley Quinn-inspired makeup should be your intense eye look, so you should put a lot of creamy red eyeshadow on one eye zone and just as much creamy blue shadow for the other eye and go for a smudgy effect. To add to the drama, use eyeliner, mascara, and sparkles to enhance your eyes, too.

While the eye area is the focal point of the Harley Quinn look, you shouldn't forget lipstick. You won't need the exact lip color Margot Robbie wore as Harley Quinn in "Birds of Prey" or the actual lip color she wore in the "Suicide Squad" movie, but you should still go for bold. Smudged red lipstick is the way to go. Plus, you can use black eyeliner for drawing her heart and "ROTTEN" face tattoos. Furthermore, your hair is up to you. You can get away with only styling your locks in pigtails, especially if you're a blond. But if you want to get that daring colorful look that we see in the movies, you should consider using a wig or temporary hair color.