Lee Jeong-min, known professionally as Seo Eun-soo (Korean: 서은수), is a South Korean actress and model. Seo made her acting debut in the 2016 television drama Don't Dare to Dream (2016). Seo received her big break after portraying the role of Seo Ji-soo in the KBS2 family drama My Golden Life (2017–2018). She appeared in other popular dramas, such as Dr. Romantic (2016), Duel (2017), Top Management (2018), and Legal High (2019). Her other works include The Smile Has Left Your Eyes (2018), Unlock My Boss (2022), Missing: The Other Side (2020–2023), and The Witch: Part 2. The Other One (2022).

The Smile Has Left Your Eyes is a 2018 South Korean television series starring Seo In-guk, Jung So-min and Park Sung-woong. It is a remake of the 2002 Japanese television series Sora Kara Furu Ichioku no Hoshi. It aired on tvN from October 3 to November 22, 2018 every Wednesday and Thursday at 21:30 (KST).