Yoo In-soo: All of Us Are Dead Actor, Military Service & Dramas

Yoo In-soo spent two seasons terrifying viewers as the ruthless Yoon Gwi-nam in Netflix’s zombie hit “All of Us Are Dead.” Now, the 26-year-old South Korean actor has traded the school corridors of Hyosan for military discipline — and his transition from K-drama villain to air force sergeant tells a story that fans of Korean entertainment will find surprisingly familiar. Here’s what we know about his career, his service timeline, and what comes next.

Born: March 25, 1998 · Breakout Role: Yoon Gwi-nam in All of Us Are Dead · Current Status: Serving in air force military band · Instagram: @k.a_innsoo · Notable Dramas: Forgotten, Alchemy of Souls

Six facts anchor the public record on Yoo In-soo, drawn from agency announcements, entertainment news coverage, and fan-compiled profiles.

The key facts table below summarizes basic biographical data from verified sources.

Is Yoo In-Soo in All of Us Are Dead 2?

Role in original series

Yoo In-soo portrayed Yoon Gwi-nam, the calculating antagonist who clawed his way through Hyosan High School’s zombie outbreak in “All of Us Are Dead” (2022). His character stood out as one of the series’ most ruthless figures — a student who prioritized survival at every moral cost. The role marked his most high-profile project to date and introduced him to an international audience through Netflix’s global reach.

Season 2 casting updates

As of October 2024, no confirmed announcements link Yoo In-soo to the rumored second season of the Netflix zombie drama. His enlistment on November 18, 2024, means any production involvement would require a break in his military service — an arrangement that has precedent for major Korean stars but has not been reported in his case.

Is Yoo In-Soo in the military?

Enlistment details

Yes. On October 11, 2024, his agency Management Koo announced that Yoo In-soo had received official notice of acceptance to the Republic of Korea Air Force. He passed the military band MC exam after an interview and physical assessment in August 2024 — a competitive process that requires specific performance qualifications (Maeil Business Newspaper). He volunteered for Air Force service despite having the option to delay enlistment due to his acting career.

Current service

Yoo In-soo began active duty on November 18, 2024, reporting to the Air Force Education Command for basic training before transitioning to his assigned post. His current role is military band MC sergeant — a position that involves hosting performances and official ceremonies rather than combat duties (NamuWiki). Air Force service in South Korea runs 21 months, three months longer than Army service.

What dramas and movies has Yoo In-Soo starred in?

Breakout role

Yoo In-soo’s career breakthrough came with “All of Us Are Dead” (2022), but his acting resume extends further back. He debuted in 2017 in the JTBC drama “Strong Woman Do Bong-soon” and appeared in the 2017 thriller film “Forgotten,” which earned modest box office recognition in its domestic market (NamuWiki). His portfolio also includes appearances in “Alchemy of Souls,” “The Good Bad Mother,” “The Uncanny Counter 2,” and “The Midnight Studio” — series that aired during the 2022-2024 window before his enlistment.

Other appearances

Before donning the military uniform, Yoo In-soo completed filming for the movie “Boy,” a project co-starring Seo In Guk, Jo Byeong Gyu, and JINI. The film had not received an official release date as of his November 2024 enlistment. His most recent television appearance before military service was in “The Midnight Studio” (2024), a mystery drama that aired on tvN.

What is known about Yoo In-Soo’s personal life?

Background

Born March 25, 1998, in South Korea, Yoo In-soo studied at Seoul Arts College, a vocational institution that has produced several notable Korean actors. He signed with Management Koo, a Seoul-based entertainment agency that handles actor representation and project negotiations. At the time of his enlistment announcement, he was 26 years old.

Social media

Yoo In-soo maintains an Instagram account under the handle @k.a_innsoo, where he shares personal updates and behind-the-scenes content. His agency used this channel to issue the official statement announcing his enlistment — a common practice for Korean celebrity military announcements. During active service, his social media activity is expected to remain limited per military regulations.

Yoo In-Soo height, wife and other facts

Physical stats

Yoo In-soo’s height has not been publicly confirmed through verified sources — a detail that remains unlisted in his official profiles and agency biography. Unlike some Korean actors who disclose physical measurements during press tours, this information simply has not surfaced in available coverage.

Relationships

No confirmed reports detail a wife, marriage, or public relationship for Yoo In-soo. His social media presence focuses on professional content and fan interaction rather than personal relationships. This privacy is standard for Korean celebrities, particularly those in their mid-twenties who are still building their careers.

Yoo In-Soo career timeline

The milestones in Yoo In-soo’s public record follow a recognizable arc for a mid-career Korean actor — early guest work, a breakout Netflix role, then military service as the next expected chapter. For more on actors with significant roles in popular series, check out Rebecca Ferguson pel·lícules i sèries de televisió.

Military service specifics

Yoo In-soo’s Air Force commitment spans 21 months — a longer duration than the Army’s standard 18-month service, but one that reflects the Air Force’s distinct training and assignment structure.

What we know versus what’s rumored

“Fulfilling the sacred duty of national defense is something I must do. I want to make this a meaningful time when I can prepare for new opportunities as an actor as well.”

— Yoo In-soo via allkpop

“We kindly ask for your understanding as there will be no special event on the day of his enlistment. We appreciate your support and wish him a safe and healthy return.”

— Management Koo statement via Times Now

Summary

Yoo In-soo’s trajectory follows a familiar template for a Korean actor of his generation: build a career through television and streaming platforms, then pause for mandatory service before returning to the industry. His “All of Us Are Dead” role gave him international recognition; his Air Force band position keeps him connected to performance during the pause. With an expected return in mid-2026, the question for fans is not whether he will return, but which projects will shape the next chapter of his career once he does.

Related reading: Shaun of the Dead

Yoo In-soo, famed for his villainous Yoon Gwi-nam in All of Us Are Dead, began military service profile on November 18 by enlisting in the Air Force military band.

Frequently asked questions