Jung-In (정인) was born December 7, 1980, in South Korea as Jung-In Choi (최정인; Choi Jung-In) and is a singer who debuted in the song Rush by Lessang in 2002.

Choi had been a member of the R&B group G.Fla from it’s conception in 2005, until their disbandment in 2007. After G.Fla, she remained as a soloist, releasing original works as well as works for Korean dramas.

In 2013, it was announced that she had married fellow singer and songwriter Jung-Chi Jo (조정치), and the two went on to have two children together – their first born, a daughter named Eun Jo, was born in 2017 and the couple welcomed their second child, a baby boy named Sung Woo Jo in 2019.