Song Ji-eun was born on May 5, 1990, in South Korea, she is an only child. Having interest in music when she was young, she auditioned for JYP Entertainment at an early age. While in JYP Entertainment, she sang OSTs of Korean dramas in 2007 and 2008 such as "Learning To Fly" for Air City. Under JYP Entertainment, she was set off to debut as a four-member girl group with Sistar's Hyorin and BESTie's Uji, EXID's Hani, but the plan was scrapped and Song then left JYP Entertainment and joined TS Entertainment.