Quick facts

Full name
Seo In-guk
Korean name
서인국
Born
October 23, 1987
Age
38
Birthplace
Ulsan, South Korea
Nationality
South Korean
Occupation
singer · actor
Years active
2009–
Agency
Story J Company
Debut
professional activity, 2009
Reply 1997 → Death's Game

Seo In-guk: Biography and beginnings

Seo In-guk (서인국) — Seo In-guk. Born: October 23, 1987, Ulsan, South Korea. active since: 2009. represented by: Story J Company.

The documented starting point used here is professional activity, 2009. Height, MBTI, residence and family details are not filled automatically; fields without a strong source remain hidden. Official production titles retain their distributed form.

Career development — Reply 1997

Seo In-guk entered the industry through music after winning Superstar K, while Reply 1997 opened his acting career. Shopping King Louie used comedy and romantic charm, Doom at Your Service moved into fantasy, and Death's Game required a darker framing character.

Selected filmography: Seo In-guk

This selection is not a substitute for a complete filmography. It traces the route from Reply 1997 through Reply 1997 to Death's Game, listing character and platform separately.

  • 2012 — Reply 1997 — role: Yoon Yoon-jae — tvN
  • 2013 — The Master's Sun — role: Kang Woo — SBS
  • 2016 — Shopping King Louie — role: Louie — MBC
  • 2021 — Doom at Your Service — role: Myul Mang — tvN
  • 2022 — Café Minamdang — role: Nam Han-jun — KBS2 / Netflix
  • 2023–2024 — Death's Game — role: Choi Yi-jae — TVING

Career timeline: Seo In-guk

  • 2009 — professional activity, 2009
  • 2012 — Reply 1997
  • 2023–2024 — Death's Game

Recently documented work: Death's Game

The most recent reference included in this selection is Death's Game (2023–2024). The wording is deliberate: the page does not automatically call it the “latest project” unless the source supplies a complete current list. The permanent profile can absorb the next confirmed role without creating a duplicate page.

Sources and verification: Seo In-guk

Core source: Korean Film Council — KOFIC. Biographical data and projects are published only when they can be tied to the displayed sources. Where shown, age is calculated automatically from the birth date under the international standard; it is not stored as a fixed number.

Source

Independent publication documented from primary sources. Rankings and reviews are transparently labelled editorial opinion.