Koo Hye-sun is a South Korean actress, singer-songwriter, director and artist. She gained widespread recognition in the television dramas Hearts of Nineteen (2006), The King And I (2007), Boys Over Flowers (2009), Take Care of Us, Captain (2012), Angel Eyes (2014), Blood (2015).

Boys Over Flowers is a 2009 South Korean television series starring Koo Hye-sun, Lee Min-ho, Kim Hyun-joong, Kim Bum, and Kim Joon. Based on the Japanese manga series Boys Over Flowers written and illustrated by Yoko Kamio. The series tells a story of a working-class girl who gets tangled up in the lives of a group of wealthy young men in her elite high school. It aired for 25 episodes on KBS2 from January 5 to March 31, 2009.