Oh Dal-su (오달수) is a South Korean actor. Oh Dal-su began his acting career in theater in Busan, and since 2001 has been the head of theater company Singiru Manhwagyeong ("Mirage and Kaleidoscope"). His rich experience on the stage, in local productions such as Ogu, later made Oh an in-demand supporting/character actor on the big screen.

Oh has starred in numerous successful films, in roles such as the owner of the organized crime-funded private jail in Oldboy (2003), a former gang boss in Mapado (2005), a weapons smuggler in A Bittersweet Life (2005), a transvestite in Foxy Festival (2010), a Chinese-Korean conman in The Thieves (2012), and a sympathetic inmate in Miracle in Cell No. 7. He also dubbed the voice of the monster in The Host (2006).

吴达洙，韩国男演员。毕业于东医大学工业设计专业的吴达庶在大学时期曾在中小戏剧和演出团担任临时演员，还送过报纸，后来进入演艺界，此后逐渐在电影界立足。出演了处女作《迪斯科王》。随后拍摄了《老男孩》、《六人视线》、《最后一只狼》、《孝子洞理发师》、《如果花开的春天来临》等，其中在《老男孩》中扮演私设监狱长时铁锤拔牙那一幕凄惨绝伦，其出色的演技可见一斑。