The script for the sequel to Joaquin Phoenix’s Joker is complete. They’re turning the movie into a musical.
Lady Gaga is “in early talks” to join the sequel. She would be cast as Harley Quinn. Joaquin Phoenix has read the script but not yet committed to returning to his Oscar-winning role if it's a musical.
Todd Phillips will direct the film for Warner Bros. He produced the remake of A Star Is Born with Lady Gaga and Bradley Cooper. (The Hollywood Reporter)