- Name: Kim Yoo Jung
- Native name: 김유정
- Also Known as: Kim Yu Jeong;Kim You Jung;Kim Yoo Jeong
- Nationality: South Korean
- Gender: Female
- Born: September 22, 1999
Kim Yoo Jung is a South Korean actress. After her acting debut at the age of 4, she became one of the best-known child actresses in Korea. She has discovered at 5 years old in a contest that her older sister joined; she won the Most Popular Award even though she was not one of the contestants. She is now transitioning into adult roles and is best known for Dong Yi, Moon Embracing the Sun and May Queen.
She studied at Goyang High School of Arts.
She is considered "Korea's Little Sister" when she was a child actress,\. She has since been dubbed "Sageuk Fairy" after starring in several acclaimed historical period dramas in her career. In 2017, she ranked 8th on Forbes Korea Power Celebrity list, the youngest to be included in the Top 10 at 17 years old.
In February 2018, it was revealed that Kim was diagnosed with dysfunctions of the thyroid gland and would take a break from acting.