Lee Sung-min (Korean: 이성민) is a South Korean actor. He is best known for his supporting roles on television and film, notably his much-praised performances in Golden Time (2012), Broken (2014), Misaeng: Incomplete Life (2014), and Reborn Rich (2022). Lee has also received critical acclaim for his role in the 2018 espionage film The Spy Gone North, for which he won Best Actor at the 55th Baeksang Arts Awards.