Lady Gaga, who set to play Harley Quinn, revealed the news on her Instagram page Thursday, by posting a musical teaser.
The video posted had a red background with Gaga and her co-star Joaquin Phoenix seen as shadows dancing with the film’s title on screen as well as their names: Joker: Folie à Deux and the release date – October 4, 2024.
The teaser was set to Cheek to Cheek, which Lady Gaga has covered alongside music legend Tony Bennett.
Gaga was reportedly in early talks to play the DC Comics character Harley Quinn in June, according to a report from The Hollywood Reporter, which also revealed the project is being developed as a musical.
In June, writer-director Todd Phillips shared the title of his Joker sequel – Joker: Folie à Deux.
Margot Robbie has played Harley Quinn in 2016’s Suicide Squad, 2020’s Birds of Prey and 2021’s The Suicide Squad, though this version of Harley Quinn in Joker: Folie à Deux is said to exist in a different DC universe than Margot’s Harley Quinn.

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While the original 2019 Joker with Joaquin as the Joker was never intended to have a sequel, its critical and commercial success lead director Todd Phillips said in August 2019 that he might be interested in making a sequel, if Joaquin was interested in returning as the title character.