“She’s going to crush it! She’s going to be amazing,” Robbie said. “I actually haven’t spoken to her about it. I almost don’t want to know so I can save it for a surprise when I see the movie.”

When it comes to Harley Quinn, Robbie said she’s happy to see other actresses play the role, a dream she’s always had for Quinn.

“I always wanted Harley to be a character that would get passed on to other actresses to play, the way there are so many iconic male characters,” said Robbie. “That was always the dream for her. Harley’s so fun and can go in so many different directions. You put her in someone else’s hands, and it’s like, ‘What are they going to do with her?’ The options are endless.”

Who is in Joker: Folie à Deux?

Joaquin Phoenix reprises his Academy Award-winning role of Arthur Fleck/Joker for the sequel. Lady Gaga, who plays Joker’s love interest Dr. Harleen Quinzel, better known as Harley Quinn, will star alongside Phoenix. For the sequel, Zazie Beetz returns as Arthur’s former neighbor, Sophie Dumond. Brendan Gleeson, Catherine Keener, Jacob Lofland, and Harry Lawtey were also cast in undisclosed roles.

Todd Phillips is back to direct Joker: Folie à Deux from a script he co-wrote with Scott Silver. Released in 2019, Joker became a smash hit, grossing over $1 billion at the worldwide box office. Nominated for 11 Academy Awards, Joker won two Oscars — Best Actor for Phoenix and Best Original Score for Hildur Guðnadóttir.

Joker: Folie à Deux is scheduled to be released in theaters on October 4, 2024.