Who could forget the iconic animated 90s Batman series? The legendary Mark Hamill, also known for his role as Luke Skywalker, voiced everyone's favorite villain: The Joker. Here's a fun fact for you: the role of The Joker was initially supposed to go to Tim Curry, but producers thought his performance was a little too unhinged, which is why Mark Hamill was chosen instead.
Though he appeared on screen as an actor and also did a lot of voice work projects, too, he eventually ended up doing more voice work as his career went on. This was mostly due to being involved in a major car accident. Hamill had to undergo dramatic plastic surgery on his face after the accident and got significantly fewer film roles afterwards. His voice talent really saved him in the end.