Jang Geun-Suk was born on August 4, 1987 in Danyang Country, Chungcheongbuk Province, South Korea. He is an only child. Geun-Suk started working as a child model at the age of five after he was discovered by a talent agent. At that time, Keun-Suk's parents were selling their house and the agent, who was a prospective buyer, saw Geun-Suk. Seeing his potential, the agent advised Keun-Suk's parents to allow him to try a career in modeling.
In You're Beautiful, Keun-Suk played the role of Hwang Tae-Kyung, leader of rock band A.N.Jell, who falls in love with a fellow band member who is a female pretending to be a guy on behalf of her brother, played by Park Shin Hye. The show, which also starred Lee Hong Ki and Jung Yong Hwa, obtained a cult following online and became a hit in other Asian countries.