Song debuted in the entertainment industry in 1996 when she won the Grand Prize in SunKyung Smart (a school uniform company) when she was finishing her third year in junior high school. It was not long until she starred in her first drama, Happy Morning. Since then, she would continue to star in a string of various dramas and sitcoms but it wasn't until the KBS drama Autumn in My Heart in 2000 with Song Seung-hun and Won Bin that Song rose to fame throughout Asia. The show became famous for depicting a tragic love story between three people.
Song's popularity continued to climb when she played a leading role in the poker drama All In, alongside Lee Byung-hun.
Song costarred with singer Rain in the popular romantic comedy series Full House. After the pan-Asian success of Full House, Song starred in the movie My Girl and I, which was panned by audiences and critics alike. Song went on a 2-year hiatus, returning to acting as the kisaeng Hwang Jin-i in the movie version of Hwang Jin-i, which was released in South Korea in 2007. She then made her American debut in the Hollywood indie film Make Yourself At Home (originally titled Fetish) in 2008.
Song Hye Kyo has been considered Korea's most beautiful woman. In 2010 she was ranked #18 in TC Candler's list of "Most Beautiful Faces", along with January Jones as #17 and Emily Blunt as #19.
Hye Kyo will get married on the last day of October 2017 to fellow Descendants of the Sun actor, Song Joong Ki.