Which of these actors played the role of the Joker in the Batman movies and series?

The Joker is a supervillain created by Bill Finger, Bob Kane, and Jerry Robinson who first appeared in the debut issue of the comic book Batman (April 25, 1940), published by DC Comics. In his comic book appearances, the Joker is portrayed as a criminal mastermind. Introduced as a psychopath with a warped, sadistic sense of humor, the character became a goofy prankster in the late 1950s in response to regulation by the Comics Code Authority, before returning to his darker roots during the early 1970s.

The Joker has been adapted to serve as Batman's adversary in live-action, animated, and video game incarnations, including the 1960s "Batman" television series played by Cesar Romero and in films by Jack Nicholson in "Batman" (1989) and by Heath Ledger in "The Dark Knight" (2008). The character was adapted into his own standalone film, "Joker", in 2019 starring Joaquin Phoenix in the role. Mark Hamill, Troy Baker, and others have provided the character's voice.