Oscar nominee Lady Gaga is in early talks to star opposite Oscar winner Joaquin Phoenix in director Todd Phillips’ sequel to Joker, the 2019 Oscar-winning, $1 billion Warner hit based on the DC character.

Phillips has been co-writing the script with co-writer Scott Silver and has finally shown it to the studio.

Phillips revealed on social media the title of the new project–Joker: Folie a deux–referencing a medical term for an identical or similar mental disorder that affects two or more individuals, usually members of the same family.

While the same social media post showed Phoenix reading the script, the actor’s involvement is not exactly a legal fait accompli just yet — sources tell The Hollywood Reporter that Warners has yet to close a deal with the actor, with the two sides deep into it.

Details on her character are kept under wraps, but Joker is known for his on-off abusive relationship with Harley Quinn, his psychiatrist.

Upon meeting at the mental institution, Arkham Asylum, she falls in love with him and becomes his sidekick and partner in crime.

It is unclear whether Phillips and company are using other DC characters or striking on their own, as they did in many instances with their first movie.

If a deal makes, Gaga would play Quinn.

However, this new Harley Quinn exists in a different DC universe than the Margot Robbie’s Harley Quinn, which most appeared in 2021’s The Suicide Squad as well as several other films.

Sources say the sequel is also a musical. When Warners first made Joker, it was far from a sure hit. Dark and moody character piece, the project was a Taxi Driver-meets-King of Comedy descent into madness set in a late 1970s decaying city.

Commercial prospects were deemed nominal, and it was only budgeted at $60 million.

However, upon release in October 2019, Joker was riding a wave of adulation from the fall film festivals, which helped propel the movie into a record-breaking opening weekend, with box office analysts changing.

Joker ended its theatrical run as the No. 4 highest-grossing R-rated movie of all time. It then earned 11 Oscar nominations, including best picture, and won best actor (for Phoenix) and best score (for Hildur Guonadottir).

Phillips previously produced A Star Is Born, the 2018 remake that starred Joker producer Bradley Cooper and Lady Gaga.