Joaquin Phoenix's "Joker" Trailer Is Here We have a first look at the new standalone Joker movie on Wednesday. The trailer shows the origin story of the villain. Joaquin Phoenix is definitely a bit creepy in the two-minute clip. Robert De Niro, Zazzie Beetz, Marc Maron, and Mark Tyree Henry also star in the movie. Joker hits theaters on October 4th. What do you think of the trailer? Do you think he'll be a good Joker? In Theaters October 4th.