Although the character of "Cousin Itt" did not debut on The Addams Family (1964) until over a third of the way through the entire series, Silla's delightfully odd and inspired performance of the character made him so popular that "Cousin Itt" was carried over into both the animated series and the motion picture versions of "The Addams Family", even though the character was a creation of television producer David Levy and not part of the original Charles Addams cartoons (neither was the character of "Thing").
