Kim Sung-kyun (Korean: 김성균; born May 25, 1980) is a South Korean actor.

He began his career in theatre, eventually making his on-screen debut as a gangster boss's faithful henchman, in Nameless Gangster: Rules of the Time (2012), followed by supporting roles in The Neighbor (2012), Reply 1994 (2013), Reply 1988 (2015–2016), Moon Lovers: Scarlet Heart Ryeo (2016),[1][2][3][4][5][6][unreliable source?

][7] as well as leading role in series D.P.

(2021–2023) and Divorce Attorney Shin (2023).