Joker: Folie à Deux ending explained: So, who is the Joker?
Joker: Folie à Deux is not the sequel some fans might expect, and its unexpected ending packs the biggest surprise of them all. Picking up the story after the ending of 2019's Joker, the movie follows Arthur Fleck (Joaquin Phoenix) as he awaits trial for the murder of five people, including TV presenter Murray Franklin (Robert de Niro).