How old is Harley Quinn?

Harleen Quinzel was born on July 20, 1990 in the gritty streets of Gotham City‘s East End neighborhood. Raised in a broken home with an alcoholic father prone to violence, young Harley learned from an early age to fend for herself on those very streets that also produced the maniacal Joker. Ever the survivor, Harley funneled her trauma into her academic studies – topping her class in psychiatry at Gotham University. This proficiency later landed Harley an internship at the prestigious Arkham Asylum, where she was assigned to psychoanalyze one particular patient with a penchant for chaos – The Joker. And the rest, as they say, is history…

But before diving into Harley Quinn‘s sensational backstory, a key question on every fan‘s mind is – how old is Harley Quinn actually? Across her multitude of backstories told through various comic books, TV shows and movies spanning nearly 30 years, Harley‘s age has been subject to some retconning:

Harley Quinn‘s Age in Original Batman: The Animated Series Backstory

In her original backstory from Batman: The Animated Series that aired in the 1990s, Dr. Harleen Quinzel is explicitly shown to have been born on July 20, 1990 in Gotham City.

EventYearHarley‘s Age
Year of Birth19900 years
Interns at Arkham Asylum2008-201018-20 years
Becomes Harley Quinn2008-201018-20 years

When we first meet her, Harleen is an intern psychologist at Arkham Asylum assigned to psychoanalyze the Joker. She quickly falls in love with the Clown Prince of Crime. By the time Harley helps break Joker out of Arkham and becomes his full-time partner-in-crime, she seems to be in her early 20s.

If we assume the series itself is set between 2008-2010 contemporaneously, and that Harley is about 18-22 years old when she adopts her Harley Quinn persona, this would make Harley 33-35 years old presently in 2024!

However, DC comics have gone through….

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