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 made his first puppeteer performances for neighborhood children as a child.
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.