Easily the most famous and iconic of Jim Henson's muppet creations, Kermit is the main character on many of the Muppet projects that have come down the pipeline over the years. The green frog is usually portrayed as the leader with a calm and logical personality. Although, he is often shown to have fits of anger thrown in the mix. He is constantly dealing with the advancements of Miss Piggy.
Kermit was voiced by his creator, Jim Henson until the Muppet legend passed away in 1990 at which point Steve Whitmire took over the role.