Costas Mandylor (born Constantinos "Costas" Theodosopoulos Greek: Κωνσταντίνος "Κώστας" Θεοδοσόπουλος; 3 September 1965) is a Greek Australian actor. He is best known for his role as Kenny in Picket Fences, and for portraying Mark Hoffman in the Saw films.