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Jeong In Seong

Jeong In Seong promoting "Gravity" (2017)

Jeong In Seong (정인성) is a Korean pop singer. He is a member of the group KNK.


  • Birth Name: Jeong In Seong (정인성)
  • Birthdate: July 1, 1994 (1994-07-01) (age 29)
  • Height: 183cm
  • Weight: 71kg


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