Kim Yoo-jung is a South Korean actress. She debuted as a model for a confectionery brand at the age of four. After her acting debut in 2003, she became one of the most in-demand child actresses in Korea. She gained public attention for starring in television series Dong Yi (2010), Moon Embracing the Sun (2012), May Queen (2012), Golden Rainbow (2013), Secret Door (2014) and Angry Mom (2015). She also starred in the films Commitment (2013), Thread of Lies (2014), and Circle of Atonement (2015). She hosted music show Inkigayo from November 2014 to April 2016.

Dong Yi is a 2010 South Korean historical television series starring Han Hyo-joo in the title role, along with Ji Jin-hee, Lee So-yeon and Bae Soo-bin. The series centers on the love story between King Sukjong and Choe Suk-bin. It aired from 22 March to 12 October 2010 on MBC TV's Mondays and Tuesdays at 21:55 time slot for 60 episodes.