Harley Quinn (Dr. Harleen Frances Quinzel) is a fictional Batman character who appears in American comic books published by DC Comics. She was created by Paul Dini and Bruce Timmis and made her debut in The Batman Adventures #12 (September 1993). She is the girlfriend and partner in crime of the Joker and best friends with Poison Ivy. She dresses up like a jester or harlequin in red, black, and white. Later she dresses in shorts and tops with blonde hair, which is half pink and half blue in pigtails.
She was voiced by Arleen Sorkin in Batman: The Animated Series. Harley Quinn makes her live-action cinematic debut in the DC Extended Universe (DCEU) film Suicide Squad (2016), where she is portrayed by Margot Robbie. Robbie reprises her role in Birds of Prey (2020) and The Suicide Squad (2021), with elements of her portrayal's design consequentially incorporated into comics. Singer and actress Lady Gaga will play the character in Joker: Folie à Deux (2024).