 Prior to his debut as an idol, he won a "Daesang" at the 16th Suwon Music Festival 2008, and even became vice president of Red Cross Youth Gyeonggi Province in 2009.He began his military duty by enlisting as an active duty soldier on January 14, 2019.On July 24, Lee recorded a special single— a new theme song for the ROK Army alongside Shinee's Onew and Key, Exo's Xiumin, Infinite's Kim Sung-kyu, 2AM's Jo Kwon and Jinwoon, Yoon Ji-sung and actors Kim Minseok, and Lee Jae-kyoon.