Harley Quinn first appeared on Batman: The Animated Series in 1992's "Joker's Favor" episode. Since then, she's become a fan-favorite among many. Eventually she made her move into the comic world with multiple appearances and even her own series. Harley has even crossed over into video games and soon will be on the big screen in the 2016 Suicide Squad movie.
You can check out and read up on Harley on her wiki page HERE but here's a great infographic with her info and an evolution of her look over the years.
Infographic Created by HalloweenCostumes.com
Are you excited to see Harley on the big screen?