Matthew Lillard
From Muppet Wiki
Matthew Lillard (b. 1970) is a comic actor best known for playing "Shaggy" in the Scooby-Doo movies.
Lillard played the eccentric choreographer Luc Fromage in It's a Very Merry Muppet Christmas Movie, hired to help the Muppets with the big production number in their Christmas show.
