The Joker is a fictional character who appears in Christopher Nolan's 2008 superhero film The Dark Knight, based upon the DC Comics character and supervillain of the same name. He was portrayed by Heath Ledger.
Sadly, Ledger passed away before the movie appeared in theaters. But his performance was so legendary, that he won an Academy Award.
This feature video talks about the amazing performance of Ledger and how he made Joker one of the best villains in the world.
Over the years, many actors have had amazing performances as The Joker. But the one by Heath Ledger stands out for most fans.