He’s not alone anymore. Joker: Folie à Deux comes to theaters on October 4th.

The film sees Joaquin Phoenix‘s Arthur Fleck sharing his psychotic disorder with Lady Gaga‘s Harley Quinn. Todd Phillips returns to direct the film which also sees Zazie Beetz return as Sophie Dumond as well as Catherine Keener, Brendan Gleeson, Ken Leung, and Steve Coogan.