Song Won-geun (Korean: 송원근; born December 17, 1982) is a South Korean singer and actor.

Song made his entertainment debut in 2000 as a member of the boyband OPPA, singing in the group's second album Reincarnation.

[1] He then launched his career as a solo artist under the stage name RUN (Korean: 런), releasing one album and two singles in 2008 to 2009.

Song also began acting in 2010, and has since starred in several stage musicals and television dramas.

This article about a South Korean actor is a stub.