Oh Yeong-su, who plays Oh Il-nam in Squid Game, has had a long acting career. He started out in theatre, starring in productions like King Lear, The Tempest, and Fathers and Sons. In terms of film and TV, Oh built a reputation for portraying monk characters, like in A Little Monk and Spring, Summer, Fall, Winter… and Spring, and the 2009 historical drama Queen Seondeok.