 Frank Oz was Miss Piggy's principal performer from her early appearances on "The Muppet Show" until his departure from the cast in 2000; his last known performance as Piggy was an appearance on "The Today Show".Oz's earliest known performance as Piggy was actually in a 1974 appearance on "The Tonight Show".Richard Hunt occasionally performed Miss Piggy during the first season of "The Muppet Show", alternating with Oz.