Seo Hyun-woo (born 20 November 1983) is a South Korean actor who began his career on stage and made his debut in a musical in 2010. In the same year, he won an acting award at The 9th Off Daehakro Festival.

He is widely recognized for his portrayal of reporter Kim Moo-jin in the 2020 drama Flower of Evil. In 2022, Seo played the role of Sa Cheol-seong in Park Chan-wook's film Decision to Leave. His performance earned him the New Actor Award at the 21st Director's Cut Awards.