The upcoming sequel, Joker: Folie à Deux, starring Joaquin Phoenix and Lady Gaga, is set to portray the complex relationship between Joker and Harley Quinn through an unconventional musical lens. Director Todd Phillips emphasized the emotional authenticity of the performances, stating that the musical numbers are not about perfect notes, but rather about capturing the characters' chaotic essence. The film, which takes place two years after the first installment, features Arthur Fleck in a psychiatric ward, where he meets Harley Quinzel, leading to their shared musical journey. Gaga noted that the songs reflect the duo's inner emotional lives and take place in their imaginations, blending genres of drama, comedy, and fantasy. The film is expected to premiere in theaters and IMAX on October 4, 2024, alongside a new promotional poster highlighting the film's intense themes.