Sung Chang‑Hoon (Korean: 성창훈), born April 22, 1979 in South Korea, is a South Korean actor who debuted in the early 2000s. While details about his formal education are scarce, he began his career in 2003 with the film Scent of Chrysanthemums and later appeared in Wild Card. Over the years, he built a strong reputation as a versatile supporting actor on Korean television.

Sung has amassed over 20 years of experience playing diverse roles—from a waiter in Wild Card (2003) to the hardened henchman Suk Doo‑Sik in City Hunter (2011). He rose steadily, featuring in numerous high-profile dramas such as Temptation of an Angel, Angel Eyes, Mask, Remember: War of the Son, and Don't Dare to Dream. In the 2016–2017 series The Legend of the Blue Sea, he took on a supporting role as one of Yang's men, contributing to the show's blend of fantasy and romance. More recently, Sung has continued his TV streak with Mom Has an Affair (2020), Ghost Doctor (2022), Agency and Pandora: Beneath the Paradise (2023). His career is marked by consistent, memorable performances in both film and television.