Aidan Gallagher (born September 18, 2003) is an American actor, best known for his role as Nicky Harper on the Nickelodeon series Nicky, Ricky, Dicky and Dawn (2014-2018).
In the time that Arthur Fleck was incarcerated in Arkham Asylum, two unrelated criminals that both claim to be him have been causing trouble across Gotham City. As Arthur escapes with a new ally (AKA Dr. Harleen Quinzel), he and these other "Jokers" plan a new strike on Gotham...all while a figure from the shadows prepares to oppose them.
