Oh Chang-seok (; born June 2, 1982) is a South Korean actor. He is best known for his leading role in the 2013 television series Princess Aurora.
On July 2, 2019, Oh and model Lee Chae-eun confirmed their relationship when they took on the role of first pitcher and batter at a baseball game. The two began their relationship after appearing on the romance reality show Taste of Dating. They have since parted ways.