Wi Hajoon didn't become a global name overnight. Long before international audiences recognized him as the masked detective in Squid Game, he spent years grinding through minor film roles, independent projects, and supporting television parts. His journey from an aspiring actor born on a remote South Korean island to a central pillar of the Hallyu wave offers a masterclass in versatility. Instead of locking himself into a single box, he moves seamlessly between terrifying villains, morally gray anti-heroes, and charming romantic leads.
Understanding his rise requires looking past the viral fame of a single streaming hit. His career trajectory highlights how modern South Korean entertainment builds lasting global stars through rigorous training, genre experimentation, and undeniable screen presence.
The Early Years and Groundwork
Born in August 1991 on Soando island in South Jeolla Province, Wi grew up far away from the glitz of Seoul's entertainment district. His initial path toward performance started innocently through a middle school dance club, which sparked a broader passion for the stage. He later pursued this ambition formally by majoring in theatre and film at Sungkyul University.
His professional debut came in 2012 with a short film titled Peace in Them. For the next several years, he took whatever work came his way, picking up uncredited or minor background roles in commercial films like Coin Locker Girl (2015) and Bad Guys Always Die (2015). These early underground years sharpened his physical agility—he trained extensively in boxing and acrobatics—which later proved essential for his action-heavy roles. Variety has also covered this critical subject in great detail.
His first major turning point arrived in horror. In 2018, he starred in the found-footage horror flick Gonjiam: Haunted Asylum. The film became a massive box-office hit in South Korea, proving that Wi could command audience attention in a high-tension ensemble environment. That same year, he transitioned smoothly into television, picking up well-received supporting parts in romance and melodrama series like Something in the Rain and Romance Is a Bonus Book.
The Global Phenomenon: Squid Game and International Stardom
The catalyst for Wi's global recognition came in September 2021 with the premiere of Netflix's Squid Game. As Hwang Jun-ho, the resilient police officer who infiltrates the deadly games disguised as a pink-suited guard, Wi anchored the narrative's primary investigative subplot.
His character provided a grounded, boots-on-the-ground perspective that contrasted sharply with the surreal violence of the games. Even though his face was hidden behind a geometric mask for large portions of the series, his tense physical performance and expressive eyes captured international imagination. The role instantly transformed his social media following from a modest domestic base into millions of global fans, setting the stage for subsequent seasons.
Breaking the Mold: Action, Thrillers, and Complex Characters
Many actors who achieve sudden fame through a blockbuster thriller get typecast as action heroes. Wi actively subverted that expectation by jumping into wildly contrasting projects right after Squid Game.
The Unhinged Side: Midnight and Bad and Crazy
In the 2021 thriller film Midnight, Wi played a chilling, sadistic serial killer who stalks a hearing-impaired woman through the streets of Seoul. The performance shattered his nice-guy image, revealing a terrifying intensity that unnerved viewers.
Later that year, he co-starred in the superhero-adjacent action comedy Bad and Crazy alongside Lee Dong-wook. As "K"—the chaotic, motorcycle-riding alter ego who dispenses violent street justice—Wi delivered a comedic yet high-octane performance that highlighted his knack for hyper-stylized physical comedy.
Stepping Into Complex Dramas: Little Women and The Worst of Evil
By 2022, Wi secured his first major leading-ensemble television roles that demanded moral ambiguity. In the slick mystery drama Little Women, he played Choi Do-il, a sharp, enigmatic consultant navigating dangerous financial webs. Viewers spent half the episodes guessing whether his character was a reliable ally or a treacherous villain, a tension Wi maintained with subtle micro-expressions and understated delivery.
He followed this with Disney+'s gritty 1990s crime epic The Worst of Evil (2023). Portraying Jung Gi-cheol, a ruthless gang boss carving out an empire in the Gangnam drug trade, Wi portrayed a man torn between brutal survival instincts and lingering emotional vulnerability.
Transitioning to Romantic Leads
While action and thrillers built his international reputation, South Korean television broadcasting relies heavily on romantic versatility. In 2024, Wi stepped firmly into leading romantic territory with The Midnight Romance in Hagwon. Playing an ambitious former student who returns to his old cram school as an instructor—only to romance his former teacher—he proved he could carry a grounded, emotional narrative without relying on stunts or bloodshed.
Common Misconceptions About Wi Hajoon's Career
- Myth: He became an overnight success purely because of Squid Game.
- Reality: Wi spent nearly a decade working through minor film parts, indie shorts, and supporting television roles before landing the breakout detective part.
- Myth: He only plays action heroes and police officers.
- Reality: His filmography features stark genre shifts, ranging from terrifying serial killers in Midnight to quirky alter-egos in Bad and Crazy and romantic leads in The Midnight Romance in Hagwon.
Frequently Asked Questions
What was Wi Hajoon's first major acting role?
His professional debut was in the 2012 short film Peace in Them, but his first commercial breakthrough that drew widespread industry attention was the 2018 horror film Gonjiam: Haunted Asylum.
Does Wi Hajoon return for subsequent seasons of Squid Game?
Yes. He reprises his role as detective Hwang Jun-ho across the continuation of the series on Netflix, continuing his pursuit of the underground organization.
What martial arts or physical training does he have?
Wi has a strong background in acrobatics and boxing, which he actively utilizes to perform many of his own stunts in high-action projects like Bad and Crazy and Shark: The Beginning.
What is his upcoming or most recent work?
He continues to diversify his portfolio with major television projects, including leading roles in tvN romance dramas and ongoing streaming thrillers.
