Arthur Fleck will return in Joker: Folie à Deux with a new ensemble in the sequel to the successful 2019 Joker film. Phoenix reprises his role as Joker, along with newcomer Lady Gaga as Harley Quinn.

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Dealing with all the negativity and bullying from society, he heads downwards on a spiral, in turn showing how his alter ego, "Joker," came to be.

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