Moon Sook is a South Korean actress. She is known for her roles in dramas such as Tunnel, The Uncanny Counter, Matrimonial Chaos, Kkondae Intern and Lovers of the Red Sky. She also appeared in the movies Keys to the Heart, ', Shades of the Heart and Emergency Declaration. She was a popular actress in the 1970s. In the 1970s she was called the Audrey Hepburn of Korea due to her resemblance to the actress.
Moon married director Lee Man-hee in 1974 who was 23 years older than her and already married. The marriage did not last long due to Lee Man-hee's death in 1975. Actress Lee Hye-young is her step-daughter. She later moved to America to study painting, where she met and married an American man with whom she has two children.