Harley Quinn

Harley Quinn (Dr. Harleen Frances Quinzel) is an antiheroine appearing in American comic books published by DC Comics. She was created by Paul Dini and Bruce Timm for Batman: The Animated Series as a henchwoman for the Joker, and debuted in the series' 22nd episode, "Joker's Favor", on September 11, 1992. Although originally intended to appear in only one episode, Quinn became a recurring character within the DC Animated Universe (DCAU) as the Joker's sidekick and love interest, and was adapted into DC Comics' canon seven years later, beginning with the one-shot Batman: Harley Quinn #1 (October 1999). Quinn's origin story portrays her as a former psychiatrist at Arkham Asylum in Gotham City manipulated by the Joker, her patient, eventually becoming his accomplice and lover.

The character's alias is a play on the stock character Harlequin from the 16th-century Italian theatre commedia dell'arte. Following her introduction into comics in 1999, she has been depicted as a former doctor-turned-sidekick and lover of the Joker, as well as a close friend and love interest of Poison Ivy.

Harley Quinn's abilities include expert gymnastic skills, proficiency with weapons and hand-to-hand combat, complete unpredictability, immunity to toxins, and enhanced strength, agility, and durability. She often wields clown-themed gag weapons, with an oversized mallet serving as her signature weapon. Additionally, she has a pair of pet hyenas, Bud and Lou, who sometimes act as her attack dogs. Quinn has become one of DC Comics' most popular and commercially successful characters, appearing in numerous comic book titles and being adapted into various other media and merchandise. DC Comics publisher Jim Lee has described Harley Quinn as the fourth pillar of DC Comics' publishing line, after Superman, Batman, and Wonder Woman.

The character has been adapted into various media incarnations. In film, she has been portrayed by Margot Robbie in the DC Extended Universe (DCEU) films Suicide Squad (2016), Birds of Prey (2020), and The Suicide Squad (2021), and by Lady Gaga in Joker: Folie à Deux (2024). In television, she was portrayed by Mia Sara in Birds of Prey (2002–2003) and had a voice cameo by Tara Strong in Arrow. Arleen Sorkin, the character's original voice and inspiration, along with Tara Strong, Hynden Walch, and Kaley Cuoco (in the eponymous Harley Quinn animated series), are among the many performers who have voiced the character in animation and video games.