Kostas Triantafyllopoulos (also written as Kostas Triantafillopoulos) (Greek: Κώστας Τριανταφυλλόπουλος) (born 8 February 1956 in Athinaio, Arcadia, Greece) is a Greek actor. He graduated from Theodosiadis's Drama School of Athens in 1977 and he has played a wide variety of roles on stage from Greek tragedy, Aristophanes and Shakespeare to contemporary American drama (Eugene O'Neill, Arthur Miller, Tennessee Williams, Joyce Carol Oates, Thornton Wilder, Sam Shepard).