Leonardo DiCaprio and Joaquin Phoenix Were Offered the Role of the Joker in The Dark Knight, But Turned it Down

Leonardo DiCaprio and Joaquin Phoenix were both offered the iconic role of The Joker in Christopher Nolan's The Dark Knight, but ultimately declined the opportunity, according to the film's casting director John Papsidera. At the Nashville Film Festival, Papsidera revealed that the script was initially sent to DiCaprio, who never responded.

When the offer was extended to Phoenix, he informed the filmmakers that he was not interested in taking on a "big" movie role. Eventually, Heath Ledger was cast for the part, which went on to win an Oscar for him in 2019's Joker. DiCaprio went on to star in Nolan's subsequent film, Inception. It was reported that Warner Bros. had tried to persuade Nolan and his team to cast DiCaprio as a different villain, Riddler, in the third Batman movie, but the creative team opted for Bane, which proved to be a more fitting choice for a story about an aging Batman.

The casting choices ultimately led to Phoenix playing a distinct version of The Joker in his two films, where the character is portrayed as more chaotic and less calculated compared to previous interpretations.