Batman's arch nemesis with the infamous grin, pale white mask, purple suit and penchant for complete chaos has intrigued readers for years.
Though the Joker's origins have been one of DC's closely guarded secrets, writers over the years have given us some brilliant stories.
Here are the five best Joker origin stories.
Do you know?
The commonality in the origin stories
While the Joker has some truly original re-imagined origins, most of them agree on two common strands- he was the leader of the infamous Red Hood gang that terrorized Gotham, and he had a chemical accident that led to his current condition.
In need of money for his pregnant wife, he made a mob deal to rob a chemical plant. However, his wife dies and during the robbery, his attempt to escape Batman lands him in the chemical vat.
We sympathize with the man who became the Joker 'one bad day'.
All the world's a stage, and all people actors
The Joker is certifiably insane and represents chaotic evil. However, the 'Case Study' by Paul Dini and Alex Ross put a fresh twist.
They showed the Joker as a sociopath, who faked the insanity to avoid the death penalty.
Driven to criminal activities, he had created the Red Hood persona, but when the law caught up, he used the Joker image to escape punishment.
We were destined to do this forever
One of the freshest takes on the Joker's origin was, Neil Gaiman's 'Whatever happened to the Caped Crusader?'.
The story is narrated by Bruce Wayne or Batman, from beyond his grave. It explores that Alfred, Bruce's butler, created the persona of Batman's archnemesis to help him get into the shoes of the masked vigilante.
Nonetheless, the degree of Alfred's betrayal makes this comic striking.
Things fall apart, the center cannot hold
'Flashpoint' by Geoff Johns explores a fresh origin story for Joker and Batman.
For those unaware, Bruce becomes the masked vigilante after he witnesses his parents' mugging and murder. However, in the Flashpoint universe, it is Bruce who has been killed.
His father Thomas Wayne becomes a violent gun-toting Batman. His mother, Martha, is driven insane with grief and becomes the archenemy, Joker.