Yoon Joo is a South Korean actress. Yoon was a 3rd Dan taekwondo player until middle school, when she ended her sport training due to an injury.

She then attended Anyang Arts High School to learn acting. After graduating from Suwon Women's University with a degree in acting, Yoon got her first role in the 2010 theater play Catch him. In the same year, Yoon played the main role in the movie Bad Blood, after she was introduced to the audition by a person who worked with her on the play Catch him.