• Full name: Lee Dong-hyuk
  • Date of Birth: June 6, 2000
  • Nationality: Korean
  • Blood type: AB
  • Group: NCT, NCT127, NCT U, NCT Dream
  • Agency: SM Entertainment
  • Debut: 2016
  • Position in the group: main vocalist, lead dancer
  • Family members: Mom, dad, twin sister, 2 younger brothers, Haechan
  • Nickname: ‘Donyuk’,’Millennium baby’,’Poodu’, and ‘teddy bear’
  • Haechan has a twin sister
  • He made each handshake with NCT members
  • Haechan learned sports-dance for three years before his debut and said it helped him a lot with flexibility