Mark Hamill (born September 25, 1951; 72 years old) is an actor and voice actor. Some of his best-known roles include The Joker in many Batman related cartoons and video games, Luke Skywalker in some editions of the Star Wars franchise (mainly the films), and Firelord Ozai in Avatar: The Last Airbender.
He voices Kavaxas in the 2012 TV series.