Mark Hamill honed his famous Joker laugh playing another DC villain in 1990's The Flash

Before voicing The Joker on "Batman: The Animated Series," Mark Hamill used his laugh as a live-action villain on 1990's "The Flash" series.
TVLine

Before Voicing The Joker, Mark Hamill Played Another DC Comics Villain With A Distinctive Laugh

After appearing in the original Star Wars trilogy as Luke Skywalker, Mark Hamill's place in pop culture history seemed secured, but the actor blew audiences' minds when he voiced the Joker in 1992's ...
Yahoo

Mark Hamill Honed His Famous Joker Laugh Playing Another DC Villain In 1990's The Flash

Add Yahoo as a preferred source to see more of our stories on Google. The Joker smiling and pointing a finger - DC/YouTube It's one of the most iconic vocal performances in the history of animation: ...