Matthew Lyn Lillard is an American actor, voice actor, director, and producer. He is best known for portraying Chip in Serial Mom, Stu in Scream, Stevo in SLC Punk!, Billy Brubaker in Summer Catch, Jerry Conlaine in Without a Paddle and Shaggy Rogers in both Scooby-Doo and Scooby-Doo 2: Monsters Unleashed.