“Joker: Folie à Deux” picks up with Arthur Fleck ( Joaquin Phoenix ), institutionalized at Arkham Asylum, awaiting trial for his violent crimes. As he grapples with his fractured identity, Arthur finds love with fellow inmate Lee (Gaga) and begins embracing the music that has always played inside his chaotic mind.

Folie à Deux,” Lady Gaga will introduce audiences to Lee Quinzel, her version of the Joker’s love interest Harley Quinn from the DC comic books.

In developing the ‘Joker’ sequel, director Todd Phillips said the team “just found ourselves writing more and more music into it”