Kang Hye-jeong (강혜정 - born January 4, 1982) is a South Korean actress who has starred in films such as Oldboy and Welcome to Dongmakgol. She first made official debut as magazine model, and she studied performing arts at the Seoul Institute of Arts. She acted in Pen-Ek Ratanaruang's Thai film Invisible Waves, which was chosen as the masterpiece of Thailand in 2006.
