'Joker 2' trailer shows Lady Gaga and Joaquin Phoenix causing total chaos

Joaquin Phoenix's Joker finally meets his match in the trailer for the upcoming film "Joker: Folie À Deux!"

Harley Quinn is brought to life by none other than Lady Gaga, who can be heard saying, "When I first saw Joker, when I saw you, for once in my life, I didn't feel so alone anymore."

The pair come together to sing and dance — and get violent.

The trailer shows Joker and Harley Quinn on stage, performing for a crowd in front of cameras, before blowing the whole studio up.

"Joker: Folie À Deux" will premiere in cinemas on October 4.

It is the sequel to the hit 2019 film "Joker." They completed production in April last year. —JCB, GMA Integrated News