From the Joker's appearances in The Batman to Mark Hamill's classic take in Batman: The Animated Series, Joker's best versions are unforgettable.

Jack Nicholson took his role as The Joker in 1989's 'Batman' so seriously that it scared him, and it helped legitimise the comic book genre.

DC's most popular antivillain of all time just got dangerously close to one of Batman's worst enemies - and every single other version of him.