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Ko Chang-seok
★ Acting

Ko Chang-seok

Born 1970 · Busan, South Korea · Active 2001–2026

Ko Chang-seok is a South Korean actor known for his compelling performances in the realm of cult cinema. He appears in Lady Vengeance (2005), a film that stands as a cornerstone of the revenge thriller genre, showcasing the darker aspects of human nature. With a background in film that resonates with the themes of vengeance and redemption, Ko's role contributes to the film's intense narrative and emotional depth. His work in Lady Vengeance highlights his ability to navigate complex characters in a visually striking and morally ambiguous landscape.

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Lady Vengeance

Lady Vengeance

2005 ★ 7.5
as Woo So-young's Husband

A Christian musical procession waits with a symbolic block of tofu outside a prison for the release of Lee Geum-ja (Lee Young-ae), a reformed female prisoner. Convicted of kidnapping and murdering a 6-year-old schoolboy, Won-mo, 13 years earlier, Geum-ja became a national sensation because of her young age, angelic appearance, and eager confession to the crime. However, she became an inspirational model for prisoner reform during her incarceration, and her apparent spiritual transformation earned her an early release. Free, she is now intent on revenge. Geum-ja quickly shows that her "kind-hearted" behavior in prison was a cover to earn favor and further her revenge plans. She visits the other paroled inmates, calling in favors that include food, shelter, and weapons. She begins work in a pastry shop and starts an affair with a young shop assistant, Geun-Shik, who would be the same age as Won-mo, had he lived. It is revealed that Geum-ja did not smother Won-mo. The detective on her case was aware of her innocence, but helped her fake crime-scene details to ensure her confession looked credible. As a young high school student, Geum-ja had become pregnant and, afraid to go home to her parents, turned to Mr. Baek (Choi Min-sik), a teacher from her school, for help. Mr. Baek expected Geum-ja to provide sex and assist in his kidnapping racket in return. He used her to lure 5-year-old Won-mo to him, with the intent of ransoming the child, but murdered the boy. He then kidnapped Geum-ja's infant daughter and threatened to murder the baby if Geum-ja did not take the blame. She has spent her time in prison planning revenge on Mr. Baek for the murder of Won-mo, causing Geum-ja's child to grow up without a mother, and for sending her to prison. Geum-ja discovers that her daughter was adopted by Australian parents. Jenny, now an adolescent, does not speak Korean and does not initially embrace her mother, though she does return with Geum-ja to Seoul to bond. Geum-ja plans to kidnap and murder Mr. Baek, now a children's teacher at a preschool, with the aid of his wife, another ex-convict. Mr. Baek hires thugs to kill Geum-ja and Jenny but Geum-ja kills them and Mr. Baek is subdued. Mr. Baek wakes up tied to a chair in an abandoned schoolhouse. On his cell phone strap, Geum-ja discovers the red marble from Won-mo's crime scene, which had been taken as a trophy, and is horrified to see other children's trinkets also on the strap. After shooting him in both feet, she discovers snuff tapes in his apartment of the other children he had murdered. He had not been part of a ransoming racket; he would kidnap and murder a child from each school he worked at because he found them annoying. After killing each one, he would fake a ransom call to the parents, collect the money, and move on to a different school. Sickened that four more children died because Geum-ja did not turn in the real killer 13 years ago, Geum-ja and the original case detective contact the parents and relatives of the missing children to the school. After watching each tape, the group decides to murder Mr. Baek together. They take turns beating, mutilating and torturing him until he is dead, then take a group photo, ensuring that none of them can turn in the others without implicating themselves. They then bury the corpse outside. Geum-ja, the detective, and the relatives all converge at Geum-ja's bakery. Afterward, she sees the ghost of the murdered child who then transforms into his grown self (the age that he would have been if he had lived). Later, she meets Jenny and instructs her daughter to live purely, like tofu. She buries her face in an all white frosting covered cake and weeps as Jenny hugs her.

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Career Highlights Top 6 by popularity · TMDB

Filmography

85 credits
2020s 27 credits
2026
Director's Arena as Self (archive footage)
TV ★ 8.0
2025
The Go-to Restaurant as Ko Shin-soo
Movie
2025
The Match as Seung-pil
Movie ★ 7.4
2025
Boss as Manager Chu
Movie ★ 6.0
2025
Believe as (segment "come to an end")
Movie ★ 5.5
2025
Way Back Love as Jeong Yil-beom
TV ★ 8.0
2025
My Dearest Nemesis as Baek Won-seob
TV ★ 7.9
2025
Melo Movie as Ma Seong-u
TV ★ 7.3
2025
TV ★ 8.5
2024
The Killers as Smile (segment "Silent Cinema")
Movie ★ 6.0
2024
Chicken Nugget as Baek-joong's father
TV ★ 6.3
2024
TV
2023
Countdown as Principal
Movie ★ 6.1
2023
Dream as Jeon Hyo-bong
Movie ★ 6.9
2022
Movie ★ 6.9
2022
Project Wolf Hunting as Ko Geon-bae
Movie ★ 6.4
2022
Movie ★ 7.0
2022
Glitch as Kim Chan-woo
TV ★ 6.8
2022
Today's Webtoon as On Ki-bong
TV ★ 6.5
2021
Movie ★ 7.4
2021
Sinkhole as Fire Chief
Movie ★ 6.9
2021
TV ★ 8.7
2021
Kingdom: Legendary War as Self - Guest
TV ★ 9.1
2020
Innocence as Seedsman
Movie ★ 7.7
2020
The Good Detective as Cha Moon-Ho
TV ★ 7.2
2020
Memorist as Goo Kyung-tan
TV ★ 7.5
2020
TV ★ 7.5
2010s 41 credits
2019
Movie ★ 6.7
2019
Movie ★ 7.0
2019
Arthdal Chronicles as Tae-ap-dok
TV ★ 7.6
2018
Be With You as Hong-gu
Movie ★ 8.2
2018
Dark Figure of Crime as Diving Captain Jam-soo
Movie ★ 6.6
2018
The Miracle We Met as Song Hyun-chul (B)
TV ★ 8.0
2018
Encounter as Nam Myeong-sik
TV ★ 7.9
2017
A Taxi Driver as Sang-gu's Father
Movie ★ 8.0
2017
Movie ★ 8.0
2017
TV ★ 8.0
2016
Movie ★ 7.2
2016
TV ★ 7.0
2015
Reply 1988 as Mi-ok's father
TV ★ 8.8
2015
Kill Me, Heal Me as Dr. Seok Ho-pil
TV ★ 8.1
2014
The Huntresses as Moo-Myung
Movie ★ 5.7
2014
Tabloid Truth as Baek Moon
Movie ★ 6.1
2014
Slow Video as Doctor Seok
Movie ★ 7.0
2014
Movie ★ 6.9
2014
The Night Watchman as Minister Ddoong
TV ★ 4.0
2013
Mr. Go as Detective So
Movie ★ 6.6
2013
Secretly, Greatly as Seo Sang-gu
Movie ★ 7.0
2013
The Spy: Undercover Operation as Department head Jin
Movie ★ 6.0
2013
The Face Reader as Choi Dae-gam
Movie ★ 7.0
2013
TV ★ 6.9
2013
Good Doctor as Jo Jung-mi
TV ★ 8.0
2012
Over My Dead Body as Hwang Seong-goo
Movie ★ 6.5
2012
Mr. XXX-Kisser as Sung-cheol
Movie ★ 6.5
2012
The Grand Heist as Hong Seok-chang
Movie ★ 6.4
2012
Movie ★ 5.5
2012
Miss Conspirator as Detective So
Movie ★ 6.2
2012
Almost Che as Police officer Kim
Movie ★ 6.5
2011
The Showdown as Du-soo
Movie ★ 6.6
2011
The Front Line as Yang Hyo-sam
Movie ★ 7.2
2011
Quick as Detective Seo
Movie ★ 6.0
2011
Mr. Idol as Han Jong-tak
Movie ★ 5.1
2011
Movie ★ 5.8
2010
A Barefoot Dream as Park In-gi
Movie ★ 7.1
2010
Hello Ghost as Chain-smoking Ghost
Movie ★ 7.6
2010
Second Half as Seafood Restaurant Owner
Movie ★ 4.0
2010
Secret Reunion as Vietnam Boss
Movie ★ 6.4
2010
TV ★ 8.3
2000s 15 credits
2009
Movie ★ 6.4
2009
Insadong Scandal as Hojinsa, forgery factory president
Movie ★ 5.8
2009
City of Fathers as Kim Kang-soo
Movie ★ 5.5
2009
Dream as Straw
TV ★ 6.0
2008
Antique as Gay Club Master
Movie ★ 6.2
2008
Rough Cut as Director Bong
Movie ★ 6.9
2007
Going by the Book as Woo Jong-dae (uncredited)
Movie ★ 7.3
2006
Ice Bar as Cop
Movie ★ 5.8
2006
The Host as Nurse
Movie ★ 7.0
2006
Running Wild as Gang Member
Movie ★ 6.2
2006
Movie ★ 6.4
2005
Lady Vengeance as Woo So-young's Husband
Movie ★ 7.5
2005
TV ★ 7.7
2004
The Last Wolf as Narrow Eyes
Movie ★ 7.2
2001
Movie
s 2 credits
Movie