Sept. 19 (UPI) -- Warner Bros. said its Joker origin story will follow Joaquin Phoenix's Arthur Fleck as he transforms into Batman's greatest foe.
Todd Phillips -- who is directing and producing the project from a screenplay he co-wrote -- shared on Instagram last weekend the first photo of Phoenix as the character. The image showed an unsmiling Phoenix wearing rumpled attire. It was captioned "Arthur," but Phillips' post contained no other hints about the eventual villain or the film's plotline.