Costas Mandylor is an Australian actor. He is best known for his role as Kenny in Picket Fences, and for portraying Mark Hoffman in the Saw films.
Mandylor's first major role was in the 1989 film Triumph of the Spirit playing a European Jew, which was filmed at the Auschwitz-Birkenau death camp. He returned to Los Angeles meeting director Oliver Stone and auditioned and got the role of an Italian count in The Doors (1991). Mandylor landed a leading role in Mobsters playing Mafiaboss Frank Costello. In 1992 he had a lead role on the CBS television drama, Picket Fences, playing officer Kenny Lacos until the show ended in 1996. Mandylor also had a lead role in the Saw films as Detective Mark Hoffman.