Costas Mandylor (born Constantinos"Costas" Theodosopoulos Greek: Κωνσταντ?νο?"Κ?στα?" Θεοδοσ?πουλο?; 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.