Ryoo Seung-bum (Korean: 류승범; born August 9, 1980) is a South Korean actor. He made a name for himself in a variety of eclectic films directed by his older brother Ryoo Seung-wan, notably Die Bad (his acting debut in 2000), Arahan (2004), Crying Fist (2005), The Unjust (2010), and The Berlin File (2013). Known for his manic energy, calm demeanor, and subtle ability to command a scene, over the years Ryoo Seung-bum has cemented himself as one of Korea's top actors.