"Joker: Folie à Deux" makes a mockery of Harley Quinn and Lady Gaga
But a new one has entered the realm of Harley-lore alongside the only other live-action portrayal from Margot Robbie in "Suicide Squad" and "Birds of Prey." In Todd Phillips' "Joker: Folie à Deux," musician Lady Gaga ditches her pop star digs to morph into an unrecognizable version of the character.