One of the most anticipated movies of the fall season is unquestionably "Joker: Folie a Deux." The film serves as a sequel to 2019's "Joker," which became the first R-rated movie in history to cross $1 billion at the box office. It also earned Phoenix an Oscar for Best Actor. That being the case, fans are eager to see Joaquin Phoenix return as the Clown Prince of Crime once more in director Todd Phillips' follow-up. The fact that Lady Gaga is also on board to play a brand new version of Harley Quinn only adds to the intrigue. However, it wasn't a guarantee that Phoenix was going to sign on for a sequel, despite the original's success. Getting the Oscar-winner back came with one major condition.

Speaking with Empire, Phoenix and Phillips discussed the sequel, which is due to hit theaters in October. For Phoenix, he was only willing to come...