Rose to fame first as a member of the K-pop group SM Rookies and then, in 2016, as a member of the supergroup NCT and its award-winning subgroups NCT U and NCT 127. He also joined the supergroup SuperM in 2019.
After graduating from the Seoul School of Performing Arts, he became an apprentice at SM Entertainment in 2012.
In 2012, he made a cameo in the SBS drama To the Beautiful You.
The Seoul native has stated the hardest thing about being a K-pop singer is being apart from his family.
He is joined in NCT and NCT U by fellow Korean singer Doyoung.