Joker: Folie à Deux first clip sees Lady Gaga's Harley Quinn and Arthur Fleck break out into song
Folie à Deux is here, and it sees Lady Gaga's Harley Quinn (named Lee in the movie) bonding with Joaquin Phoenix's Arthur Fleck in a fittingly unusual way. In the footage, which you can see below, both characters appear to be in Arkham.