Gong Ji-cheol (Korean: 공지철; born July 10, 1979), known professionally as Gong Yoo (공유), is a South Korean actor. He is known for his starring roles in the television series Coffee Prince (2007), Guardian: The Lonely and Great God (2016–2017), the Netflix series Squid Game (2021–2025), and the films Silenced (2011), The Suspect (2013), Train to Busan (2016), and The Age of Shadows (2016).
Gong Ji-cheol was born on July 10, 1979, in Busan, South Korea. He is the second child and only son of Gong Won and Yoo Myung-joo. His father attended Busan Sango, a baseball academy, and was a manager of the Lotte Giants from 1983 to 1985. Gong attended Dongin High School, and pursued undergraduate studies at Kyung Hee University's Department of Theater and Film.
A 1996 edition of Gokbu Gong clan's genealogy book in Korea recorded the ancestry of Gong Yoo, under the name "Gong Ji-cheol", who was listed as a 79th-generation descendant of ancient Chinese philosopher Confucius; his mother's bongwan is Paechon, from a cadet branch of the Gangneung Yoo clan, who claimed to be Goryeo descendants of Emperor Gaozu of the Han dynasty. In 2009, the 5th revision of Confucius' family tree was published in China; however, while thousands of Korean members from the Gokbu Gong clan are included, Gong Yoo and his relatives are not listed in this official genealogy book.
Gong Yoo graduated from Kyung Hee University with a B.A. degree in theater. In 2000, he started his show business career as a video jockey on Mnet and debuted as an actor in the TV series School 4 in 2001. Thereafter, Gong did a number of supporting roles in dramas and movies and also hosted the music program Music Camp in 2004.
2005–2007: Coffee Prince and breakthrough
In 2005, he landed his first lead role in SBS's Hello My Teacher opposite Gong Hyo-jin. This was followed by the romance melodrama One Fine Day in 2006.
Gong was then cast in MBC's romantic comedy Coffee Prince, which became his breakout role. The popularity of the drama not only solidified his status as a leading man, but also made him a hallyu star.
2008–2015: Military enlistment and comeback
On January 14, 2008, Gong enlisted for the mandatory service, and was discharged on December 8, 2009. He did eight months of frontline active service in Cheorwon and was transferred to the Defense Media Agency, where he served in the public relations department and hosted as a DJ for the army radio station.
He made his comeback in the romantic comedy Finding Mr. Destiny, which was a medium box office hit in Korea.
He then initiated and pursued the production of a theatrical adaptation of Gong Ji-young's novel The Crucible, a congratulatory gift from his senior for his promotion during enlistment. This movie was internationally released under the title Silenced. Upon its release on September 22, 2011, the film sparked public outrage. This led to a reopening of the investigations into the incidents on which the novel and film are based. Public demand for legislative reform reached the National Assembly, where a revised bill to target sex crimes against minors and the disabled, dubbed the Dogani Bill after the Korean title of the film, was successfully passed in late October 2011.
Gong then starred opposite Lee Min-jung in the romantic-comedy series Big written by the Hong sisters. The drama was well received, although it was criticized for its ending.
In 2013, he returned to the big screen, after a two-year gap, in the movie The Suspect. He played an elite North Korean spy who defects after being betrayed by his country.
In November 2013, Gong was appointed as a special representative of the United Nations Children's Fund (UNICEF) in Korea, in conjunction with a celebration of the 24th year since the Convention on the Rights of the Child (CRC) was adopted. Following his appointment, he has visited countries around the world to raise awareness of the situation of children in underdeveloped countries.
On July 7, 2014, Gong was named as an ambassador for the National Tax Service (NTS), alongside actress Ha Ji-won. The pair modeled for promotional posters and took part in street campaigns that encourage honest tax payment in support of the NTS.
2016–present: Career resurgence
Gong experienced a new high in his career with consecutive hit works in 2016. His first film in 2016 was the melodrama A Man and a Woman alongside Jeon Do-yeon. He then starred in the hugely successful zombie blockbuster Train to Busan, which surpassed 11 million admissions in South Korea. Also that year, he starred in another box office hit The Age of Shadows, which surpassed 6 million admissions in two weeks.
In December 2016, Gong returned to television in Kim Eun-sook's fantasy-romance drama Guardian: The Lonely and Great God, playing the titular goblin. The drama was a massive hit and Gong won Best Actor at the Baeksang Awards for his performance.