Ryu Seung-soo (born August 12, 1971) is a South Korean actor. Ryu made his acting debut in 1997 with a minor role in Park Chan-wook's film Trio, and has been active as a supporting actor on film and television since. Among his notable films are the monks-versus-gangsters comedy Hi! Dharma! (2001), "kimchi" western The Good, the Bad, the Weird (2008), and Korean War movie The Front Line (2011). He also appeared on TV in the quirky series Evasive Inquiry Agency (also known as Four Gold Chasers, 2007), revenge drama The Chaser (2012), and power-struggle saga Empire of Gold (2013).