Joker (2019)

Arthur Fleck, also known as the Joker, is the titular protagonist villain of the 2019 psychological thriller film Joker, a DC Comics stand-alone film based on the character of the same name and the first installment of the DC Black film series. Set in 1981, Fleck was an stand-up comedian of Gotham City who turned to a life of crime after his discovers the truth about his past.

He was portrayed by the legendary Joaquin Phoenix, who also portrayed Commodus in Gladiator.

History
To be expanded

Trivia

 * This incarnation of the Joker, as well as the film itself, has been well received by both critics and comic book fans, despite initial skepticism on the film's success considering the uneven reception that films on the DC Extended Universe have met as of currently. Some have going as far to suggest that Joaquin Phoenix's performance of the Joker has outranked the legendary portrayal of the late Heath Ledger from The Dark Knight, which is regarded as the best Joker in film.
 * Despite the critical acclaim Joker has received, this incarnation of the Joker has received much controversy following allegations of possible attempted massacres following the shooting orchestrated by James Holmes which took place in a theater of Aurora, Colorado back in 2012 during the midnight screening of The Dark Knight Rises. When found by the police, Holmes supposedly identified himself as "The Joker". As a result, Warner Bros. has increased the security measures for screenings of the film, which will not be played on such Aurora theater.
 * On an unrelated note, the announcement of Joaquin Phoenix's Joker was likewise not well received by Jared Leto, who plays the Joker in the DC Extended Universe since Suicide Squad. Reportedly, Leto was displeased with the existence of multiple different contemporary Joker characters. Ironically, Leto's portrayal of the Joker is considered the most negatively received.
 * Leonardo DiCaprio, who also portrayed Calvin Candie in Django Unchained, King Louis XIV in The Iron Mask and Jay Gatsby in The Great Gatsby, was originally approached by Warner Bros. to play the Joker, but Joaquin Phoenix was cast instead. According to director Todd Phillips, Phoenix was his only choice for the role. On the other hand, Phoenix accepted the role because it was the kind of comic book film he wanted to make and because he would not have to appear in sequels as the film is intended to be stand-alone.