First rose to fame in 2015 as a member of the K-pop training team the SM Rookies. He then went on to make his debut as a member of the NCT subgroup NCT U.
He first began taking music lessons at the age of seven, starting playing the guitar.
NCT made their reality television debut in 2016 on their series NCT Life.
He was born and raised in Seoul, South Korea.
Taeyong and Doyoung are also recognized members of NCT and it's subgroup NCT U.