The Instagram post doesn’t reveal who Gaga might play, but one possible role would be the Joker’s longtime partner Harley Quinn (previously played by Margot Robbie in the DCEU). The film is rumored to incorporate more musical elements, however, which would make Gaga a logical fit. Phillips previously shared on Instagram that the sequel was moving forward in June with the title Joker: Folie à Deux, which literally translates to “madness for two.” Although Joker was originally intended as a standalone film, its box office success and Academy Awards (where it received 11 nominations, including Best Picture) made a sequel an obvious choice. This is especially true given the abysmal performance of Warner Bros. films based on DC Comics titles. Although this year’s The Batman was widely considered a success (with a sequel quickly greenlit), Ezra Miller’s solo outing as The Flash has been mired in difficulties, and last year’s The Suicide Squad flopped at the box office. The Joker sequel is expected to begin production in December, Deadline reports. Update Aug. 4, 12:29 p.m. ET: The film’s release date and Lady Gaga’s casting have been confirmed.