'Joker: Folie à Deux' Trailer Teases Joaquin Phoenix and Lady Gaga's Musical Romance

The trailer for the "Joker: Folie à Deux" sequel features Joaquin Phoenix's Joker and Lady Gaga's Harley Quinn embarking on a twisted romance, causing mayhem as they waltz through an asylum and beyond to the tune of "What The World Needs Now Is Love." The preview hints at a musical vibe and elaborate sets, with the 13-time Grammy winner taking on a creepy new role. The trailer ends with Harley Quinn painting a lipstick smile on a prison divider, expressing her desire to see the real Joker, who responds with his iconic smeared makeup look.