Born on February 26, 1977, in Uiryeong County, South Gyeongsang Province, South Korea, Oh Jung-se is a versatile actor known for his extensive work in theater, film, and television. He began his acting career in theater and has since taken on numerous supporting roles in various productions. Notably, he has appeared in films such as As One (2012), A Millionaire on the Run (2012), and Running Man (2013). His performance in the romantic comedy How to Use Guys with Secret Tips garnered significant attention from critics and audiences alike, leading to his first leading role in the film The Hero (2013). In television, Oh Jung-se has been recognized for his roles in series like When the Camellia Blooms (2019), Hot Stove League (2019), and It's Okay to Not Be Okay (2020), the latter earning him the Best Supporting Actor award at the 57th Baeksang Arts Awards. He continues to be an active and respected figure in the South Korean entertainment industry.