Go Youn-jung (고윤정) is a South Korean actress. She made her first public appearance as a model for University Tomorrow magazine. She debuted as an actress on the television series He Is Psychometric (2019), followed it with supporting roles in Sweet Home (2020) and Law School (2021), and after her breakthrough role in Alchemy of Souls (2022), has since become one of South Korea's most sought-after actresses. She is best known for her roles in Moving (2023) and Resident Playbook (2025).