Lee Il-hyung () is a South Korean film director and screenwriter. Prior to directing his first feature film A Violent Prosecutor (2016), Lee is an assistant director on films, such as The Moonlight of Seoul (2008), My Way (2011) and ' (2014), and commercial films.
In 2016, he finally had his own opportunity to direct when he teamed up with the production company Sanai Pictures to make the thriller A Violent Prosecutor, which becomes the second highest-grossing South Korean film of 2016, with a worldwide gross.