Seo In-guk (; born October 23, 1987) is a South Korean singer-songwriter and actor. He launched his singing career after winning the talent reality show ''
Superstar K
''Superstar K'' ( ko, 슈퍼스타 K) is a South Korean television talent show series which is held yearly. First held in 2009, Superstar K has increasingly gained more attention, considered the biggest audition program in South Korea. Superstar ...
'' in 2009, and made his acting breakthrough in ''
Reply 1997'' (2012). Since then, he has starred in television series ''
Master's Sun'' (2013), ''
High School King of Savvy'' (2014), ''
Hello Monster'' (2015), ''
Squad 38'' (2016), ''
Shopping King Louie'' (2016), ''
The Smile Has Left Your Eyes'' (2018), ''
Doom At Your Service'' (2021), and ''
Café Minamdang'' (2022).
Early life and education
Seo was born on October 23, 1987, in
Ulsan
Ulsan (), officially the Ulsan Metropolitan City is South Korea's seventh-largest metropolitan city and the eighth-largest city overall, with a population of over 1.1 million inhabitants. It is located in the south-east of the country, neighboring ...
, where he lived with his parents and younger sister. He grew up in relative poverty; his mother worked as a recyclables collector and his father as a welder. Seo trained as a
ssireum wrestler, learnt boxing and
mixed martial arts
Mixed martial arts (MMA), sometimes referred to as cage fighting, no holds barred (NHB), and ultimate fighting, and originally referred to as Vale Tudo is a full-contact combat sport based on strike (attack), striking, grappling and ground f ...
in school and is a
Hapkido
Hapkido ( , , also spelled ''hap ki do'' or ''hapki-do''; from Korean language, Korean 합기도 ''hapgido'' ) is a Eclecticism#Martial arts, hybrid Korean martial art. It is a form of self-defense that employs joint locks, grappling, throw (g ...
2nd
dan. He decided to become a singer at the age of ten, after being inspired by the Korean rock musician
Kim Jung-min and watching him perform
''Sad Promise''. Seo performed at family gatherings and school events,
and moved to
Seoul
Seoul (; ; ), officially known as the Seoul Special City, is the Capital city, capital and largest metropolis of South Korea.Before 1972, Seoul was the ''de jure'' capital of the North Korea, Democratic People's Republic of Korea (North Korea ...
alone at the age of 20 to pursue his dream of becoming a singer despite his father's objections.
While studying Applied Music at
Daebul University, Seo auditioned for various record agencies such as
JYP Entertainment
JYP Entertainment Corporation () is a South Korean multinational entertainment and record label conglomerate founded in 1997 by J. Y. Park. It is one of the largest entertainment companies in South Korea, and operates as a record label, tale ...
and
DSP Media but to no success. After repeatedly being rejected and told to lose weight, he struggled with
bulimia
Bulimia nervosa, also known as simply bulimia, is an eating disorder characterized by binge eating followed by purging or fasting, and excessive concern with body shape and weight. The aim of this activity is to expel the body of calories eaten ...
for a time.
Seo later enrolled at
Kyung Hee Cyber University, Department of Information and Communication. He also pursued Master's degrees in Performing Arts at
Dongguk University
Dongguk University (Korean: 동국대학교, Hanja: 東國大學校) is a private, coeducational university in South Korea, fundamentally based on Buddhism. Established in 1906 as Myeongjin School (명진학교; 明進學校) by Buddhist pioneer ...
and Practical Music (Composition) at
Baekseok University.
Career
2009–2011: ''Superstar K'' and music releases
In 2009, Seo competed in the
Mnet singing competition program ''
Superstar K
''Superstar K'' ( ko, 슈퍼스타 K) is a South Korean television talent show series which is held yearly. First held in 2009, Superstar K has increasingly gained more attention, considered the biggest audition program in South Korea. Superstar ...
'', winning the show's first season.
On October 27, 2009, he released his debut
extended play
An extended play record, usually referred to as an EP, is a musical recording that contains more tracks than a single but fewer than an album or LP record. ''Calling'', with the same-title lead single composed by
Bang Si-hyuk topping multiple music sites on its release day. Seo signed with
Jellyfish Entertainment in the same year and won the Male Newcomer of the Year Award at the 2009
Cyworld Digital Music Awards.
In May 2010, Seo released his first single album ''Just Beginning'' with the lead single "I Love U". Seo made a brief foray into acting for the single's
music video
A music video is a video of variable duration, that integrates a music song or a music album with imagery that is produced for promotional or musical artistic purposes. Modern music videos are primarily made and used as a music marketing devi ...
, to which he described his first acting experience as "awkward", saying, "I felt my hands and feet shrivel." The album reached number seven on the
Gaon Album Chart
The Circle Album Chart, previously known as the Gaon Album Chart, is a record chart ranking the 100 most popular albums, extended plays and single albums in South Korea based on their pure sales. It is a part of the Circle Chart
The Circle C ...
, while the single peaked at number two on the
Gaon Digital Chart
The Circle Digital Chart, previously known as the Gaon Digital Chart, is the music industry standard record chart ranking the 200 most popular singles in South Korea. It provides rankings on a weekly, monthly, and yearly basis, which is based o ...
. A repackage edition of the album titled ''My Baby U'' was released three months later. Having lost over 33 pounds (15 kg) since his debut through exercise and strict diet control, Seo's changes in his physical appearance brought about rumors of
plastic surgery
Plastic surgery is a surgical specialty involving the restoration, reconstruction or alteration of the human body. It can be divided into two main categories: reconstructive surgery and cosmetic surgery. Reconstructive surgery includes cranio ...
.
In 2011, shifting his sound, Seo released the single
''Broken'' incorporating choreography into his performance, as well as summer dance track ''Shake It Up'' in which he penned the lyrics for. Despite a successful debut, Seo reportedly received the "
cold shoulder
"Cold shoulder" is a phrase used to express dismissal or the act of disregarding someone. Its origin is attributed to Sir Walter Scott in a work published in 1816, which is in fact a mistranslation of an expression from the Vulgate Bible. There i ...
" treatment from the three major Korean public networks, as he was a cable television star.
2012: Acting debut and ''Reply 1997''
In 2012, Seo was part of the cast of the
jukebox musical ''
Gwanghwamun Love Song''
and made his onscreen acting debut with a supporting role in
KBS's ''
Love Rain
''Love Rain'' () is a 2012 South Korean television series directed by Yoon Seok-ho. Set in the seventies and the present day, it tells a love story over two generations, with Jang Keun-suk and Im Yoon-ah playing dual roles. It aired on KBS2 ...
''.
According to Seo, his role in ''Love Rain'' came at a time when he was feeling anxious about the life of an entertainer, and fueled his desire for acting.
He landed his first leading role later that year, in cable channel
tvN's '90s nostalgic hit drama ''
Reply 1997''. Seo's portrayal of a teenage boy in unrequited love with his childhood best friend won praise from both audiences and critics.
''Yonhap News'' praised, "It's hard to believe he's a rookie, from acting in his eyes, to handling lines and expressing emotions".
As part of the drama's soundtrack, Seo recorded two duets with co-star
Jung Eun-ji. The first duet "All For You", a
remake
A remake is a film, television series, video game, song or similar form of entertainment that is based upon and retells the story of an earlier production in the same medium—e.g., a "new version of an existing film". A remake tells the sa ...
of the song by
Cool, topped weekly and monthly music charts and became one of the best-selling singles of the year on the Gaon Digital Chart. The single also won the Best OST award at the
Melon Music Awards and
Mnet Asian Music Awards
The MAMA Awards (formerly Mnet Asian Music Awards) is a major music awards ceremony presented annually by entertainment company CJ E&M. First held in South Korea, the majority of prizes has been won by K-pop artists, although there are other As ...
that year.
Seo appeared in
MBC's weekend drama ''The Sons'' (also known as ''Rascal Sons'') in the same year, and also signed with Japanese agency
Irving Entertainment.
2013–2015: Japanese debut, variety shows and return to acting

Seo joined the newly launched reality/variety show ''
I Live Alone'' from January to June 2013.
He returned to the music scene in April 2013 with the single ''With Laughter or with Tears'', the first soulful
ballad
A ballad is a form of verse, often a narrative set to music. Ballads derive from the medieval French ''chanson balladée'' or '' ballade'', which were originally "dance songs". Ballads were particularly characteristic of the popular poetry and ...
from his discography. Several weeks later, the song was followed by his Japanese debut with the release of the single ''
Fly Away''.
In June 2013, he was cast in ''
Master's Sun'', a drama series written by the
Hong sisters
Hong Jung-eun (born 1974) and Hong Mi-ran (born 1977), collectively known as the Hong sisters (), are South Korean television screenwriters currently managed by Studio Dragon. Together, they have written popular romantic-comedies, notably '' ...
, playing a former soldier who served in the
Zaytun Division who becomes the head of security for a shopping mall company.
In October 2013, he starred in his first big-screen leading role in ''
No Breathing
''No Breathing'' () is a 2013 South Korean sports film set in the world of competitive swimming, starring Seo In-guk, Lee Jong-suk and Kwon Yuri. The film was released in theaters on October 30, 2013. As of 2014, it sold approximately 451,669 admis ...
'', a
coming-of-age film
Coming of age is a young person's transition from being a child to being an adult. The specific age at which this transition takes place varies between societies, as does the nature of the change. It can be a simple legal convention or can ...
about two swimming rivals, alongside
Lee Jong-suk and
Kwon Yuri.
He then played a
dual role
A dual role (also known as a double role) refers to one actor playing two roles in a single production. Dual roles (or a larger number of roles for an actor) may be deliberately written into a script, or may instead be a choice made during produc ...
in ''Another Parting'', a five-episode
miniseries
A miniseries or mini-series is a television series that tells a story in a predetermined, limited number of episodes. "Limited series" is another more recent US term which is sometimes used interchangeably. , the popularity of miniseries format ...
about a man and a woman who meet in the final moment of their lives and spend one special day together.

In 2014, Seo released his first Japanese album titled ''Everlasting'', which comprises his previously released singles “Fly Away” and “We Can Dance Tonight”. The album also features a new track titled “Everlasting Love” with a total of 12 tracks. The album debuted at number nine on the
Oricon
, established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan and Western music. It started as, which was founded by Sōkō Koike in N ...
Daily Chart. Seo later won the Best 3 New Artists (Asia) award at the
Japan Gold Disc Awards.
Following the cancellation of action
noir film ''Wild Dog'' which would have been Seo's second big-screen appearance, Seo headlined cable romantic comedy series ''
High School King of Savvy'' in which he played a high school student and star hockey player who leads a double life when he's forced to take on his elder brother's job as an executive at an
IT company.
Later that year, Seo starred in his first
period drama
A historical drama (also period drama, costume drama, and period piece) is a work set in a past time period, usually used in the context of film and television. Historical drama includes historical fiction and romances, adventure films, and swas ...
''
The King's Face'', playing illegitimate crown prince
Gwanghae
''Masquerade'' (; lit. ''Gwanghae: The Man Who Became King'') is a 2012 South Korean period drama film starring Lee Byung-hun in dual role as the bizarre King Gwanghaegun of Joseon, Gwanghae and the humble acrobat Ha-sun, who stands in for the mona ...
, who becomes his father
King Seonjo's rival in politics and love.
In 2015, Seo joined the cast of
SBS variety show ''
Law of the Jungle
"The law of the jungle" (also called jungle law) is an expression that has come to describe a scenario where "anything goes". The ''Oxford English Dictionary'' defines the Law of the Jungle as "''the code of survival in jungle life'', now usual ...
'' from March to May, for the Indochina season.
He was then cast as a genius
profiler in the
police procedural
The police show, or police crime drama, is a subgenre of procedural drama and detective fiction that emphasizes the investigative procedure of a police officer or department as the protagonist(s), as contrasted with other genres that focus on eithe ...
/romance series ''
Hello Monster'' which premiered in June 2015 on KBS2.
2016–present: Acclaim
In 2016 Seo joined ''
Law of the Jungle
"The law of the jungle" (also called jungle law) is an expression that has come to describe a scenario where "anything goes". The ''Oxford English Dictionary'' defines the Law of the Jungle as "''the code of survival in jungle life'', now usual ...
'' for the second time for the show's Mongolia season.
He also starred in
OCN's workplace drama ''
Squad 38'', playing a professional swindler.
Seo called the role a turning point in his acting career, and he received favourable press reviews for his ease of transformation into multiple character personas. The drama became the highest rated drama for OCN, and Seo won a special award for his role at the 11th Asian TV Drama Conference.
He then took on the leading role in
MBC's
romantic comedy
Romantic comedy (also known as romcom or rom-com) is a subgenre of comedy and slice of life fiction, focusing on lighthearted, humorous plot lines centered on romantic ideas, such as how true love is able to surmount most obstacles. In a typic ...
''
Shopping King Louie'', playing the role of an
amnesic chaebol heir with childlike innocence.
For his performance, Seo was awarded the Excellence Award at the
2016 MBC Drama Awards.
On August 4, 2017, it was confirmed that Seo's contract with Jellyfish Entertainment had expired and that he would not be renewing his contract. On August 7, it was announced Seo had signed with BS Company.
In 2018, Seo starred in mystery
melodrama ''
The Smile Has Left Your Eyes'', a remake of the 2002 Japanese television series ''
Sora Kara Furu Ichioku no Hoshi
is a Japanese television drama, drama that aired on Fuji Television, Fuji TV. It first aired in Japan from April 15, 2002 to June 24, 2002 every Wednesday. It features music by Elvis Costello (SMILE - main theme song).
Cast
*Kimura Takuya as Kat ...
''.
The drama reunited Seo with director Yoo Je-won, whom he had previously worked with in ''High School King of Savvy''. Seo had initially contemplated taking up the role but decided to join the project following numerous discussions with director Yoo. Despite the drama's lackluster ratings, Seo's performance garnered positive press reviews. ''
The Straits Times
''The Straits Times'' is an English-language daily broadsheet newspaper based in Singapore and currently owned by SPH Media Trust (previously Singapore Press Holdings). ''The Sunday Times'' is its Sunday edition. The newspaper was establish ...
'' wrote, "It is a role that could easily slip into creepiness or smugness but Seo manages to pull off a delicate balancing act." Seo was set to star in film ''Hip Daddy'' but stepped down from the project in 2020 after production was put on hold.
In May 2021, Seo made his small-screen return with fantasy romance drama ''
Doom at Your Service'' as the
personification
Personification occurs when a thing or abstraction is represented as a person, in literature or art, as a type of anthropomorphic metaphor. The type of personification discussed here excludes passing literary effects such as "Shadows hold their b ...
of destruction. In the same month, he also returned to the big screen after eight years in
Yoo Ha
Yoo Ha (; or spelled Yu Ha; born February 9, 1963) is a South Korean film director, screenwriter and a contemporary poet. He directed the critically acclaimed films '' Marriage Is a Crazy Thing'' (2002), ''Once Upon a Time in High School'' (200 ...
's comedy-crime film ''
Pipeline'' as a drilling expert involved in an oil
heist
A heist is a robbery or burglary, especially from an institution such as a bank or museum.
Heist may also refer to:
Places
*Heist, Germany, a municipality in Schleswig-Holstein
*Heist-aan-Zee, West Flanders, Belgium
*Heist-op-den-Berg, Antwerp, ...
. Director Yoo said about Seo's casting, "I was fascinated the first time I saw him.
..His face showed so much different potential." In December 2021, Seo signed a singer contract with AER Music.
On June 14, 2022, Seo released his new single album ''Love&Love'' and its lead single "My Love", featuring
Ravi Ravi may refer to:
People
* Ravi (name), including a list of people and characters with the name
* Ravi (composer) (1926–2012), Indian music director
* Ravi (Ivar Johansen) (born 1976), Norwegian musical artist
* Ravi (music director) (1926� ...
, his first release after five years. A teaser for the music video was released on June 9, 2022 on YouTube. The same year, he played a
profiler-turned-
shaman
Shamanism is a religious practice that involves a practitioner (shaman) interacting with what they believe to be a Spirit world (Spiritualism), spirit world through Altered state of consciousness, altered states of consciousness, such as tranc ...
in
KBS2
The Korean Broadcasting System (KBS) () is the national broadcaster of South Korea. Founded in February 1927, it is one of the leading South Korean television and radio broadcasters.
KBS operates seven radio networks, ten television channels, ...
drama ''
Café Minamdang'', alongside
Oh Yeon-seo. On June 14, it was announced that Seo 'Heart & Love' fan meeting will be held at Yes24 Live Hall on July 30.On December 6, 2022, Seo will release the single "Fallen", the first single released in six months.
Seo then starred in Kim Hong-sun's action thriller film ''
Project Wolf Hunting'' as a criminal with
Jang Dong-yoon, alongside Choi Gwi-hwa and
Sung Dong-il.
Personal life
Military duty exemption
In February 2017, it was announced that Seo received his official military enlistment date, set to take place on March 28. He had previously pushed back his enlistment twice, starting in March 2015 and he gave his condition as a reason. Neither the media nor his management company states he did or didn't receive treatment though. But he'd passed a physical to enlist. It was reported he would enter his two-year military service quietly, without media coverage. Seo opted, instead, to release a music video for his self-composed song, "Better Together", written to his fans. The video was released on YouTube on March 26, 2017. However, due to a fractured ankle, Seo was excused from mandatory military service just four days after entering the military and was scheduled for a medical re-examination to determine if he was fit to return to the military. His agency released the results of his medical re-examination, revealing Seo was diagnosed with
Osteochondritis dissecans, a bone and cartilage condition. He was subsequently declared at a Grade 5 health rating and became exempt from military duty as a result.
Filmography
Film
Television series
Web series
Television
Music video appearances
Musical theatre
Discography
Concerts
Ambassadorship
Achievements
Awards and nominations
References
External links
*
*
*
*
{{DEFAULTSORT:Seo, In-guk
1987 births
Living people
21st-century South Korean singers
21st-century South Korean male actors
South Korean male singers
South Korean rhythm and blues singers
South Korean pop singers
South Korean hapkido practitioners
South Korean male idols
South Korean male film actors
South Korean male television actors
South Korean male musical theatre actors
People from Ulsan
Jellyfish Entertainment artists
Superstar K winners
MAMA Award winners
Melon Music Award winners