Are you sitting down? You better be sitting down.
Let's start small:
Via: ign.com
Here's something that you never realized:
While we're at it, here's some more famous voice actors:
That's Carlos Alazraqui (Reno 911) and Rocko from Rocko's Modern Life, Jessica Walter (Arrested Development) and Fran from Dinosaurs, and James Avery (Uncle Phil from Fresh Prince) and Shredder from Teenage Mutant Ninja Turtles.