The Joker is one of the main antagonists of DC Comics, most often pitted against his archenemy Batman, Superman, and occasionally the Justice League as a whole as a part of the Legion of Doom.
In the comics, the Joker is portrayed as a master criminal whose characterization has varied. The original and currently dominant image is of a highly intelligent homicidal maniac with a twisted, sadistic sense of humor. His most prominent origin story is that he fell into a vat of chemicals, which bleached his skin white, turned his hair green and turned his lips bright red, giving him the appearance of a clown. His crazed grin, psychotic, clown-like appearance and sadistic practical jokes all make the Joker one of the most diabolical villains of DC Comics and of all time.
He was portrayed by Jared Leto.