“Joker: Folie à Deux,” brings Joaquin Phoenix back as Arthur Fleck and introduces Lady Gaga’s Harley Quinn. On Tuesday night, fans finally got their glimpse to the sequel to 2019’s Warner Bros.’ Joker.

“I’m nobody. I haven’t done anything with my life like you have,” Harley Quinn tells Joker as she mimes shooting herself in the head.

The teaser trailer shows Phoenix’s Arthur Fleck meeting Lady Gaga’s Harley Quinn as inmates at Gotham’s Arkham Asylum and the subsequent romance and chilling mass mayhem to the tune of Tom Jones and Sammy Davis Jr.’s “What the World Needs Now Is Love.”

The 2019 Joker earned Joaquin Phoenix an Oscar for Best Actor and was a massive blockbuster, earning more than $1 billion at the box office.

Joker 2 also features in the cast Catherine Keener, Brendan Gleeson and Zazie Beetz, and is directed by Todd Phillips who helmed the original.

Joker: Folie à Deux is set to open in theaters on October 10.