Mark Lee, better known as MARK (마크), is a Canadian singer-songwriter and rapper born on August 2, 1999, in Toronto, Canada. He is a member of the boy group NCT and its units NCT U, NCT 127, and NCT DREAM. He is also a member of the supergroup SuperM.
He moved to Vancouver, Canada at a young age. In December 2013, he was introduced as part of SM Entertainment's pre-debut training team SMROOKIES.
In April 2016, MARK officially debuted as a member of NCT, in the unit NCT U, with the single "The 7th Sense". In July, he was announced to be a member of the 2nd unit, NCT 127. He also became a member of the 3rd unit, NCT DREAM, in August.
In January 2017, he joined the cast of the rapping survival show, High School Rapper. In the same year, Mark has released two digital singles under the project SM STATION - "Young & Free" with EXO'sXIUMIN, and "Lemonade Love" with Jaejung Parc.