Joker: Folie à Deux (2024) is a psychological thriller and musical sequel to the 2019 film Joker, directed by Todd Phillips. The film follows Arthur Fleck (Joaquin Phoenix), who, after spiraling into madness, forms a dangerous connection with Harley Quinn (Lady Gaga), a psychiatrist at the psychiatric institution where he is incarcerated. Together, they descend into a shared world of delusion and chaos, with the two characters developing a complex, twisted relationship. Set to a backdrop of musical numbers, the film explores themes of love, madness, and social upheaval in a gritty and disturbing Gotham City.

The sequel shifts from the dark realism of the first film into more fantastical and surreal territory, incorporating musical elements that add an unusual layer to the narrative. While Phoenix’s performance has been lauded, the film received mixed reviews, with some criticizing its disjointed storytelling and forced musical aspects. However, Lady Gaga’s portrayal of Harley Quinn garnered praise, with the film ultimately polarizing audiences and critics alike.