Kim Myung-soo, also known professionally as L, is a South Korean singer and actor. He debuted as a vocalist of boy band Infinite in 2010 and its sub-group Infinite F in 2014.

Infinite is a South Korean boy band formed in 2010 by Woollim Entertainment. The group is composed of six members: Sungkyu, Dongwoo, Woohyun, Sungyeol, L and Sungjong. Originally a seven-piece group, Hoya departed from the group on August 30, 2017.