Kermit the Frog is puppeteer Jim Henson's most famous Muppet creation, first introduced in 1955. He is the protagonist of many Muppet projects, most notably as the host of The Muppet Show, and has appeared in various sketches on Sesame Street, in commercials and in public service announcements over the years. Kermit was performed by Henson until his death in 1990. Since then, Kermit has been performed by Steve Whitmire. He was voiced by Frank Welker in Muppet Babies and occasionally in other animation projects.