William Paul Barretta (born June 19, 1964) is an American actor, director, producer, puppeteer and writer. He is best known for providing the puppetry and voice of characters such as Pepe the King Prawn, Johnny Fiama, Big Mean Carl, and Bobo the Bear. He also inherited the roles of Rowlf the Dog, The Swedish Chef, Mahna Mahna, and Dr. Teeth after the death of Muppet creator Jim Henson.