Jeong Inseong (정인성) is a South Korean singer under 220 Entertainment. He made his official debut on March 3, 2016 as the main vocalist of the boy group KNK. He is currently in hiatus due to his military enlistment.
Inseong was a former Big Hit Entertainment trainee where they both trained with the members of the boy group BTS. He also trained under FNC Entertainment which allowed him to appear as one of the trainees in a reality show called Cheongdam-dong 111 with Heejun back in 2013.