American voice actor and puppeteer who became known for bringing life to Elmo, as well as Clifford from the Muppets and Hoots the Owl from Sesame Street. He also performed characters and worked behind the scenes on the sitcom Dinosaurs.
He made his first puppeteer performances for neighborhood children as a child. He built up to 90 puppets.
He has won over 22 Daytime Emmy Awards, as well as a Primetime Emmy Award, in his career.
He has one daughter, Shannon, with his ex-wife Genia.
He did voice acting with Corey Feldman in 1990's Teenage Mutant Ninja Turtles.