The Simpsons is now into it's 25th season on Fox, hard to believe that an animated show could last that long.  The Simpsons started as a bit on The Tracy Ullman Show in 1987, created by Matt Groening based on his life.  The show started its half hour prime time run in 1989 and has been on the air ever since.  One reason for the longevity is the voice actors that bring the characters to life.  One of those actors is Dan Castellaneta who is the voice of Homer Simpson, Grandpa and many others.  Watch this video to see where the inspiration came from for each of his characters.