The Pulse of K-Entertainment

Seo In-guk
ActorStory J Company

Seo In-guk

Seo In-guk (서인국) is a South Korean actor and singer born on October 23, 1987, in Ulsan. He rose to national prominence after winning the first season of Superstar K in 2009, earning him a recording contract and launching a music career that produced several charting singles.

His acting debut came in the hit drama Reply 1997 (2012), which became a cultural phenomenon and established him as one of the genre's most versatile leads. He followed with a string of acclaimed performances across comedy, romance, thriller, and fantasy: Master's Sun (2013), Shopping King Louie (2016), The Smile Has Left Your Eyes (2018), and the fantasy epic Doom at Your Service (tvN, 2021). His multi-octave vocal range and naturalistic screen presence have made him one of the few Korean entertainers to sustain parallel careers in both music and drama at the top tier of each industry.

In 2023, he starred in the Netflix fantasy series Death's Game, playing a man who experiences multiple deaths and rebirths, in a role that attracted his largest international audience to date. He followed with Twelve (2025), a psychological thriller. In 2026, he leads the office-romance drama See You at Work Tomorrow! on tvN and Prime Video while also starring in Boyfriend on Demand on Netflix opposite BLACKPINK's Jisoo. Seo In-guk is currently signed to WM Entertainment.

3 articles20 creditsDebut: October 27, 2009South Korean

Gallery

Discography

2024
Seo In GukEP
Solo Artist
2023
Monte CristoCollaboration
Lead (Edmond Dantes)
2012
All For YouOST
Vocalist
2009
CallingEP
Solo Artist

Filmography

2026
Boyfriend on DemandK-Drama
Lead (Park Kyeong-nam)JisooNetflix
2026
See You at Work Tomorrow!K-Drama
Kang Si-wooPark Ji HyuntvNAmazon Prime Video
2025
TwelveK-Drama
Lead
2023
Death's GameK-Drama
Lead (Choi Yi-jae)
2022
Cafe MinamdangK-Drama
Lead
2022
Project Wolf HuntingFilm
Lead
2021
Doom at Your ServiceK-Drama
Lead
2021
PipelineFilm
Lead
2018
The Smile Has Left Your EyesK-Drama
Lead
2016
Shopping King LouieK-Drama
Lead
2016
Squad 38K-Drama
Lead
2015
Hello MonsterK-Drama
Lead
2014
High School King of SavvyK-Drama
Lead
2013
Master's SunK-Drama
Lead
2013
No BreathingFilm
Lead
2012
Reply 1997K-Drama
Lead (Yoon Yoon-jae)

Fans Also Ask

How did Seo In-guk become famous?
Seo In-guk first gained national attention by winning Superstar K Season 1 in 2009. He then crossed over into acting with the hit drama Reply 1997 (2012), which became a cultural phenomenon and cemented his status as a dual-career entertainer. His role in Death's Game (Netflix, 2023) further expanded his international profile.
Is Seo In-guk in a Netflix drama?
Yes. Seo In-guk stars in two Netflix projects: Death's Game (2023-2024), a fantasy series in which he plays a man who relives death across multiple lives, and Boyfriend on Demand (2026), a romantic drama opposite BLACKPINK's Jisoo.
What is Seo In-guk's latest drama in 2026?
In 2026, Seo In-guk headlines See You at Work Tomorrow! on tvN and Prime Video while also leading Netflix's Boyfriend on Demand opposite BLACKPINK's Jisoo. The pairing of a domestic office-romance play and a global streaming romance keeps him central to the year's K-drama conversation.
Can Seo In-guk sing?
Yes, singing was Seo In-guk original career before acting. He won Superstar K Season 1 in 2009 and has since released multiple studio albums and singles. He is known for his wide vocal range and has contributed OST tracks to several of his own dramas, including Shopping King Louie and Reply 1997.
What is Seo In-guk real age and hometown?
Seo In-guk was born on October 23, 1987 in Ulsan, South Korea, making him one of the older leading men in K-drama. He attended Dongduk Women's University for theatre arts and has been active in the entertainment industry since winning Superstar K in 2009.

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