Ko debuted in the
TV drama Love Tomorrow in 1993 and quickly established herself as a representative star of her generation. She made her film debut opposite
Jung Woo-sung in
The Fox with Nine Tails in 1994, which was the first Korean film to use computer-generated imagery. However, it failed to make an impression on audiences or critics. Ko first achieved wide recognition through her role in
Beat (again with Jung Woo-sung), a film that caught the imagination of many South Korean high school students. Since then she has acted in a series of successful melodramas, portraying a young model in
If the Sun Rises in the West, a
Jeju Island tour guide in
Love Wind Love Song, and a
Korean American adoptee in
Love. In 2001, Ko teamed up with actor
Lee Sung-jae in
A Day, about a married couple who have trouble conceiving a child. Her acting in the film was much praised and garnered the Best Actress prize from the local
Grand Bell Awards ceremony. Then, after two years off, Ko returned in 2003 opposite
Han Suk-kyu in the spy thriller
Double Agent; however, the film failed to live up to the expectations of most viewers and critics. She then shot two films in 2006: the horror film
APT by director
Ahn Byeong-ki, and the romantic comedy
Project Makeover by debut director Jeon Young-gap. After two commercial flops in 2007 with
Project Makeover and the SBS drama
Blue Fish, Ko went into a hiatus. A decade after her last appearance, Ko made a comeback with the KBS drama
Ms. Perfect. ==Personal life==