William Moseley is an American actor, primarily known for his performances in horror films. His best-known roles include Chop Top in The Texas Chainsaw Massacre 2 (1986), Otis B. Driftwood in Rob Zombie's Firefly trilogy, Luigi Largo in Repo! The Genetic Opera (2008), and The Magician in Alleluia! The Devil's Carnival (2015). He had a recurring role as camp cook Possum on the HBO TV series Carnivàle (2003–05). He has also released records with guitarist Buckethead in the band Cornbugs, as well as featuring on the guitarist's solo work.

Robert Sawyer, better known as "Chop-Top" is a fictional character from The Texas Chainsaw Massacre franchise; created by Tobe Hooper and L. M. Kit Carson, Chop-Top makes his first appearance in the film The Texas Chainsaw Massacre 2 (1986) as one of the film's villains and the main source of its black humor.