Park Sang-woo, known professionally as Park Hae-joon, is a South Korean actor. Park first drew attention as a supporting actor in the television series' Doctor Stranger and Misaeng: Incomplete Life both released in 2014, which led to him being cast in his first leading role in Jung Ji-woo's film Fourth Place (2015). He gained widespread recognition through The World of the Married (2020).

Hwayi: A Monster Boy is a 2013 South Korean action thriller film about a 16-year-old boy of the same name who is raised by five criminal fathers to become the perfect assassin. It takes pulling the trigger to discover his true identity after he realizes the mystery surrounding his past and his fate. It was the highly anticipated second feature film by director Jang Joon-hwan, a decade after his 2003 cult favorite sci-fi comedy/thriller Save the Green Planet!.