2009–2015: Debut and solo activities Ji-hyun was chosen as a member of
4Minute in 2009. The 5-member girl group officially debuted on June 18, 2009, with performing their debut single "Hot Issue" on
M Countdown. In 2010, Ji-hyun made her acting debut in the television series ''
It's Okay, Daddy's Girl'', playing a law student. In 2011, Ji-hyun was cast in MBC's weekend drama
A Thousand Kisses, playing the younger sister of
Ryu Jin. In February 2013, Ji-hyun was cast in the idol version of
Love and War 2, a sitcom which creates reenactments of the problems and issues a couple may face in their marriage. In October, Ji-hyun was cast in her first lead role in the mobile drama
Please Remember, Princess. In April 2014, Ji-hyun was cast in KBS' teen drama
High School. However, she dropped out of the drama due to her overseas schedules conflicts. In September, Ji-hyun was cast in the web drama
Love Cells. The same year, she starred in the
anthology film The Youth. In 2015, Ji-hyun starred in the 5-episode web drama
Never Die.
2016–present: Group disbandment, acting career On June 13, 2016, Cube Entertainment announced that 4Minute has disbanded and the members are still in discussion to renew their contracts. On June 15, Cube Entertainment officially announced that Jihyun, Gayoon, Jiyoon and Sohyun's contracts had expired on June 14 and that the members decided not to renew their contracts, hence their departure from Cube Entertainment. Since 4Minute's disbandment, Ji-hyun signed a new contract with Artist Company to pursue a career in acting. In 2017, Ji-hyun starred in KBS' youth romance drama
Strongest Deliveryman. In December 2017, Artist Company announced that she had changed her name to Son Ji-hyun. In 2018, Ji-hyun starred in TV Chosun's historical drama
Grand Prince. In December 2021, Ji-hyun signed a contract with FN Entertainment. In August 2022, Ji-hyun signed a contract with Urban Works. ==Personal life==