Joker: Folie à Deux[a] is an upcoming American musical thriller film slated to be a sequel to the 2019 film Joker. Joaquin Phoenix reprises his role as the DC Comics character the Joker, and Lady Gaga plays Harley Quinn. Zazie Beetz also reprises her role from the first film. The film is directed by Todd Phillips, who also co-wrote the screenplay with Scott Silver. It is produced by Warner Bros. Pictures and DC Studios in association with Village Roadshow Pictures, Bron Creative and Joint Effort. Principal photography took place in Los Angeles, New York City, and Cedar Grove, New Jersey, from December 2022 to April 2023. Joker: Folie à Deux is scheduled to be released in the United States on October 4, 2024, by Warner Bros. Pictures.

It is already known that “Joker 2” will take place in the high-security prison Arkham Asylum to a large extent. This was designed by its founder Amadeus Arkham as a treatment center for the mentally ill and houses a number of unusual criminals. The first “Joker” movie finished with Arthur ending up in this very asylum.

From here, obvious storylines from the comics could be picked up in “Joker 2.” The story that is most likely refers to the graphic novel “Mad Love”, in which the Joker first meets Harley Quinn and models her into his lover. This is the story of Dr. Harleen Quinzel, who works as a psychiatrist at Arkham Asylum and is supposed to treat the Joker. Due to her own traumatic past, Harleen quickly sees the Joker as a role model and is attracted to him. The Joker takes advantage of this for himself: Both start a relationship and together they escape from the prison. Harley increasingly goes insane herself and becomes more and more entangled in the relationship with the dangerous clown.