Haechan
- Birthday: 2000-06-06
- Place of birth: Seoul, South Korea
- Also know as: 해찬
Lee Dong-hyeok (born June 6, 2000), known professionally as Haechan (해찬), is a South Korean singer. He is a member of South Korean boy band NCT and its subunit NCT U alongside its fixed subunits NCT 127 and NCT Dream. On September 8, 2025, Haechan began his solo debut with the release of his first studio album Taste.
