Variety has stated that Todd Phillips' Joker: Folie à Deux is largely considered to be a "mostly a jukebox musical," incorporating a minimum of 15 reimagined versions of "very well-known" songs. Among these is reported "That's Entertainment" from the 1953 musical "The Band Wagon," famously performed by Judy Garland. Nevertheless, there remains a possibility for an original song (or two) to be included in the final cut. Information regarding the composers of these tracks, as well as the performers, remains undisclosed.
Hildur Guðnadóttir, the composer who won an Oscar for her work on the original "Joker" movie, is known for incorporating her unique and evocative musical cues into every piece.
No official confirmation has been provided regarding the specific plot details of "Folie à Deux." However, the film is categorized as a drama and is set in and around Arkham Asylum. In addition to Phoenix and Gaga, the cast features Zazie Beetz, an Emmy nominee, along with Catherine Keener and Brendan Gleeson, both Oscar nominees. The screenplay for the movie was a collaborative effort between Phillips and Scott Silver.