Jung Yi-seo (정이서) is a South Korean actress. She is known for her roles in dramas such as Tale of the Nine Tailed, Mine, Snowdrop, and All of Us Are Dead. She also appeared in movies such as Parasite, Samjin Company English Class, Real, and Josée.

（정이서）是韩国女演员。她因在《九尾物语》、《我的》、《雪花莲》和《我们所有人都死了》等戏剧中的角色而闻名。她还出演了《寄生虫》、《三进公司英语课》、《真实》和《何塞》等电影。