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Mark your calendars for Oct. 4, 2024: “Joker: Folie à Deux” will be released in theaters.

The sequel to the wildly successful “Joker” film that an Oscar has been greenlighted.

Production will likely begin in December, according to Deadline. 

cast was full of heavy hitters, including Robert De Niro and Bradley Cooper.

Joaquin Phoenix, who played the title role in the "Joker," won an Academy Award for Best Actor for his work.

Joaquin Phoenix, who played the title role in the "Joker," won an Academy Award for Best Actor for his work. (Getty Images)

The “Hold My Hand” singer-turned-actress, who most recently starred in “,” had been rumored to be joining the film for some time. 

And she would be joining the project in a post shared to her social media.

Lady Gaga, most known for her music, has recently been taking her talents to film.

Lady Gaga, most known for her music, has recently been taking her talents to film. (Getty Images)

“Folie à Deux” is a French phrase used to describe a mental disorder shared by two people, often in the same family.

There have been revelations for the upcoming film. 

Lady Gaga, seen here with another actor who portrayed the Joker, Jared Leto, is set to join "Joker: Folie à Deux."

Lady Gaga, seen here with another actor who portrayed the Joker, Jared Leto, is set to join "Joker: Folie à Deux." (Getty Images)