Before Song's debut as an actress, she was a model for Kiki Magazine.She chose "Song Ji-hyo" as her stage name as she was inspired by the two famous actors Song Seung-heon and Song Hye-kyo.
With C-Jes Entertainment's confirmation regarding Song Ji Hyo's relationship with CEO Baek Chang Joo, many fans expressed their concerns regarding SBS's "Running Man's" much-loved Monday couple."Running Man" director, Jo Hyo-jin revealed, "I just recently found out about Song Ji-hyo's relationship.We completed recordings for this week yesterday, 30 January.It was something that developed naturally by the cast as the show progressed.So, it's not really up to us to alter the concept."He added, "But now that Song Ji-hyo has gone public, I'm sure there will be gradual changes to the dynamic of the Monday couple."Song Ji-hyo and Gary are known as the Monday couple.Song then appeared in the music videos for Lee Soo-young's "And I Love You" and JTL's "Just Say Goodbye".
She also made a cameo appearance in the television drama Age of Innocence.
She was requested to join the show by PD Kim Joo-hyung (aka Myeok PD) whom Song worked with and was close to while hosting Inkigayo (Myeok PD has left Running Man to re-join Inkigayo in 2014, but later returned to Running Man after 2 years).
She was originally a guest for the second to fifth episodes, and officially joined the program in episode 6 but was unable to attend until episode 7. She then appeared in Choo Chang-min's film Late Blossom.
Song gained international fame for being the only female member of the popular Korean variety show Running Man.
Her strong and easy-going personality endeared her to many Korean and international fans.
In 2006, Song rose to fame for her role in MBC's romantic comedy Princess Hours, where she played a ballet dancer who dreams to be a ballerina.