| Full Name | Lee Dong Hyuck |
| Stage Name | Haechan |
| Native Name | 이동혁 |
| Birthday | June 6, 2000 |
| Age | 25 years and 1 month old |
| Zodiac Sign | Gemini |
| Birthplace | Seoul, South Korea |
| Height | 5’9″ (174 cm) |
| Weight | 125.7 lbs (57 kg) |
| Blood Type | AB |
| MBTI | ENFP |
| Education | Seoul School of Performing Arts |
| Languages | Korean |
| Group | NCT NCT 127 NCT Dream NCT U |
| Social Media | Instagram: [@haechanahceah] |