Johnny (쟈니) is a Korean-American singer and rapper under SM Entertainment. He is a member of the boy group NCT and its sub-unit NCT 127.
In 2008, He was cast into SM Entertainment, through the SM Global Audition in September 2007 in Chicago. On December 23, 2013, he was introduced as a member of SM Entertainment's pre-debut training team, SMROOKIES.
In 2014, he participated with other NCT-co members on the show Exo 90:2014, where they performed songs from the 90s. In 2016, he was featured in J-Min's "Ready For Your Love" music video. He played the DJ in the music video of Amber & Luna - "Heartbeat", & Yoon Do-hyun, Reddy, G2 and INLAYER - "Nightmare".