Folie à Deux writer/director/producer Todd Phillips, using the music within Arthur Fleck was an easy decision for the sequel. “There’s a romance to Arthur in the first film, like when he dances in the bathroom,

Maybe Arthur needed her to be amazing." After all, Harley, who finds love in Arthur Fleck, aka The Joker (Joaquin Phoenix), ultimately becomes his sidekick as the two unleash chaos in Gotham through their linked insanity. But finding her voice for the film ...

Lady Gaga transforms as Lee Quinzel, aka Harley Quinn, in the new film, Joker: Folie à Deux. She recently spoke about what it took to make the character, and the music within the film, work. Gaga co-stars in the film with Joaquin Phoenix as Arthur Fleck/The Joker,