Arthur Fleck is shown to suffer from a psychiatric disease called 'Pseudo-bulbar affect'. It occurs due to a traumatic injury to the brain or even due to ischemic injury i.e a Stroke. In Arthur's case, it probably was due to a traumatic (mechanical) injury to his brain as he was severely abused during his childhood.

Officially titled Joker: Folie à Deux, the upcoming sequel to 2019's Joker will feature several big names, including Lady Gaga as Harley Quinn. Following the original's success, which included setting worldwide box office records and receiving two Oscar wins, a follow-up film was officially confirmed in June 2022.

The Joker's age changes depending on the version of the character – for example, in Batman: The Animated Series, he's 44 years old, but in some stories in the comics, he has been portrayed as being in his late 50's, so it's not surprising that the movie went for a younger portrayal.

The first trailer for the much-anticipated and strike-delayed “Deadpool and Wolverine” movie starring Ryan Reynolds and Hugh Jackman was viewed by 365 million people in the first 24 hours it was available, Variety first reported Tuesday, smashing the record to become the most-viewed trailer in one day of all time.