Triangle is a 2014 South Korean television series, starring Lee Beom-soo, Kim Jae-joong and Im Si-wan. It aired on MBC from May 5 to July 29, 2014 on Mondays and Tuesdays at 22:00 (KST) for 26 episodes. Triangle was directed by Yoo Cheol-yong and written by Choi Wan-kyu, who previously collaborated on the gambling dramas All In (2003) and Swallow the Sun (2009).

Lee Yoon-mi is a South Korean actress and entrepreneur.