Joker and Harley Quinn are sharing their madness with Gotham City as mayhem reigns in the trial of Arthur Fleck.

Folie a Deux final trailer begins with the focus on Lady Gaga 's Harley Quinn, who tells Joker that she's been told that he is a bad influence on her. Some scenes include Harley walking up the steps of the courthouse with an angry mob shouting from the streets,

The Joker and his Harley Quinn are sticking together until they end, and that sentiment is clear in a new teaser clip for Joker: Folie à Deux that was released by IMDb on Wednesday (Sept. 18). In the minute-long clip,

This is going to be good for us,” Gaga says after she’s asked to leave. “Now I can be at your trial every day. I can see you every day until you get out.” Lady Gaga Reacts to Ex-Classmate Facebook Group Saying She'd 'Never Be Famous' From Lady Gaga to Mitski,

That certainly looks to be the idea in the latest trailer for Todd Phillips all-singing, all-dancing movie with music Joker: Folie À Deux, which sees Joaquin Phoenix's Arthur Fleck taking to the stand as he goes on trial for the televised killing of Murray Franklin (Robert De Niro) in Joker.

Lady Gaga is already making naysayers eat their words with just the teaser of Harley Quinn in Joker: Folie à Deux.

Lady Gaga recently shared the movie's final trailer, and she sounds absolutely incredible singing "That's Life" in it. What we know about Joker: Folie à Deux is limited, but that'll change when it hits theaters in October.

Folie à Deux' co-star Joaquin Phoenix said she lost "a lot" of weight for it. Here's what to know about her diet and fitness routines.