Actor · South Korea
Ji Sung
지성
Ji Sung debuted in 1999 and broke through with All In (2003) alongside Lee Byung-hun, later earning acclaim for Kill Me, Heal Me and Defendant, and starring as Kang Yo Han in The Devil Judge (2021). He is married to actress Lee Bo Young.
Biography
Ji Sung, born on February 27, 1977, in Seoul, South Korea, is one of the most respected and versatile actors in the Korean entertainment industry. He initially pursued a degree in theater and film at Hanyang University, with dreams of becoming a teacher. However, after being inspired by Dustin Hoffman’s performance in Rain Man, he shifted his focus to acting. Ji Sung made his debut in 1999 with the drama KAIST and quickly garnered attention for his raw talent and emotional depth.
His breakthrough role came in 2003 with the drama All In, where he starred alongside Lee Byung-hun and Song Hye-kyo. This role propelled Ji Sung into stardom. Over the years, he continued to take on challenging and diverse roles, from the revenge-driven prosecutor in Defendant (2017) to the multi-personality disorder patient in Kill Me, Heal Me (2015), a role that earned him widespread acclaim and multiple awards.
In 2013, Ji Sung married actress Lee Bo Young, after they had publicly confirmed their relationship in 2007. The couple is known as one of South Korea’s most beloved celebrity pairs. They have two children together, a daughter named Kwak Ji Yoo (born in 2015) and a son named Kwak Bo Ah (born in 2019). Ji Sung and Lee Bo Young have successfully balanced their demanding acting careers with parenting, often alternating between work and family responsibilities.
Most recently, Ji Sung starred in the 2021 hit drama The Devil Judge, where he played the enigmatic and morally ambiguous judge Kang Yo Han. The series was praised for its unique storytelling and Ji Sung’s commanding performance. As of 2024, he continues to focus on his family life, residing in the United States while also considering future projects. His ability to take on diverse and complex roles has made him one of the most respected actors in Korean television.
Profile data
- Stage name
- Ji Sung
- Native name
- 지성
- Nationality
- South Korean
- Gender
- Male
- Date of birth
- 27 February 1977
- Age
- 49
- Birthplace
- Seoul, South Korea
- Zodiac
- Pisces
- Chinese zodiac
- Snake
- Height
- 178 cm (5'10")
- Children
- Daughter Kwak Ji Yoo (born June 2015), Son Kwak Bo Ah (born February 2019)
- Portrait source
- TMDB API
- Rights holder
- TMDB / respective copyright holder
- Usage basis
- Editorial use via TMDB API, non-commercial reference
- Metadata source
- TMDB, Wikipedia, and other sources cited in the record
- Last updated
- 29 September 2026
- Editor
- Claude (AI content review)
About Ji Sung
Facts
- Celebrity Marriage: Ji Sung and actress Lee Bo Young are one of the most beloved celebrity couples in South Korea, having been together since 2007 and married in 2013.
- Award-Winning Actor: Ji Sung has received numerous awards, including a Grand Prize for his performance in Kill Me, Heal Me.
- Family-Oriented: Despite his busy schedule, Ji Sung prioritizes family time and has been known to take breaks from acting to focus on his wife and children.
- Stage Name: His real name is Kwak Tae-geun, but he chose the stage name “Ji Sung” for his acting career.
- Acting Debut: Ji Sung made his acting debut in 1999 in the drama KAIST, which marked the beginning of his long and successful career.
Ji Sung shows and movies
Main roles 3 titles
Guest appearances 2 titles
Frequently worked with
Counted from shared credits across the database, most shared titles first.





