Yang Dong-geun, also known as YDG, is a South Korean actor and rapper. He started his career as a child actor, drawing attention for his roles in the television shows Seoul Ttukbaegi and Hyung. He began releasing music as a rapper in 2001, establishing himself as a star of Korean hip-hop. Yang continued acting, gaining popularity for his roles in the television shows New Nonstop and Ruler of Your Own World. He is best known outside of South Korea for playing Park Yong-sik in the second season of Squid Game.