Kim rose to fame in 2009 with her supporting role as the heroine's best friend, Cha Ga Eul in the popular television series Boys Over Flowers.
Kim gained praise for her versatility since she also portrayed Chae Shi-ra's childhood counterpart Hwangbo Soo in the period epic Empress Cheonchu, for which she learned how to ride a horse and shoot with a bow and arrow.
His family though wealthy, is wrapped in family secrets and shame; who he thought was his one and only chance at love has now become the love of another.
When he meets Chu Ga Eul an innocent little country bumpkin can she unravel his heart and break the hard shell he has built around his heart…
That girl did confess her love towards him but for some reasons he rejected it.
From a young age So Yi Jeong has never believed in love.
She returned to Korean television in the cable drama Happy Ending.
That same year, she also appeared in Music and Lyrics, a reality show in which an actress and a male musician are paired together to collaborate, as lyricist and composer respectively, in creating a song.
She has also appeared in music videos for SHINee and 8eight, and she has been featured in magazines such as Allure Korea, Vogue Korea, In Style Korea, Elle Girl Korea and Harper's Bazaar.
In 2014 she joined the fourth season of reality show "We Got Married", for which she won the MBC Entertainment Awards for New Star of the Year and Best couple (along with the co-star Song Jae Rim).