Ko Chang-seok
Ko Chang-seok (고창석) is a South Korean actor best known as Ma Seong-u in Melo Movie (2025). He is represented by Billions.

Beyond the screen.
Ko Chang-seok (고창석) is a South Korean actor. He is represented by Billions. He began acting in 2001. He is best known as Ma Seong-u in Melo Movie (2025).
Early life
Ko Chang-seok was born on October 13, 1970 in Yongdang-dong, Nam-gu, Busan, South Korea.
Career and breakthrough
Ko Chang-seok played Dr. Seok Ho-pil in Kill Me, Heal Me (2015), played Ma Seong-u in Melo Movie (2025) and plays Foreman in Dead-End Job (2026). Kill Me, Heal Me is a 2015 television series that mixes romance, drama and comedy. Melo Movie is a 2025 television series that mixes romance, comedy and drama. Dead-End Job is a 2026 television series that mixes mystery, horror, fantasy and comedy. In the 2015 romance drama Kill Me, Heal Me, he played Dr. Seok Ho-pil. In the 2025 romance drama Melo Movie, he played Ma Seong-u. In the 2026 mystery drama Dead-End Job, he plays Foreman.
A career, chapter by chapter.
Selected drama roles
- Kill Me, Heal Me — Dr. Seok Ho-pil
- Melo Movie — Ma Seong-u
- Dead-End Job — Foreman
Explore the drama guides
Choose a title for its story, cast and release details.
- Kill Me, Heal Me — Romance · Drama · Comedy
- Melo Movie — Romance · Comedy · Drama
- Dead-End Job — Mystery · Horror · Fantasy · Comedy
Stories to find them in.
Selected credits in the Oxfea collection.
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