Actress Margot Robbie has previously played the role in three DC films -- 2016's "Suicide Squad," 2020's "Birds of Prey" and 2021's "The Suicide Squad." (CNN shares its parent company with Warner Bros., which is behind those films, as well as "Joker" and its sequel.)

"Joker" was a box office hit and earned star Phoenix his first Oscar for his role as the title character.