Park Hoon-jung (Korean: 박훈정; Hanja: 朴勳正) is a South Korean film director and screenwriter. Park first attracted notice within the Korean film industry for writing the screenplays for Kim Jee-woon's I Saw the Devil (2010) and Ryoo Seung-wan's The Unjust (2010). He made his debut as a director in 2011 with the period film The Showdown. With his second film, gangster epic New World (2013), Park scored a critical and commercial success.