The film, which had its world premiere in the Midnight Screenings section at Cannes, opened in its home market on May 21 and broke the country’s opening-day admissions record on its debut, drawing nearly 200,000 cinema-goers — surpassing the previous single-day record set by The Devil Wears Prada 2. By its second weekend, it had amassed 3,475,000 admissions and grossed $24.84 million, making it the second highest-grossing film of 2026 in Korea, behind only The King’s Warden.
Colony hit the three-million-admissions mark on its tenth day of release — four days faster than The King’s Warden reached that same threshold. Both films are distributed by Showbox, which also holds the year’s third-biggest Korean release, the horror film Salmokji: Whispering Water.
The premiere at Cannes carried its own symmetry: exactly ten years earlier, Yeon’s genre-defining Train to Busan debuted at the same festival in the same Midnight Screenings slot, launching one of Korean cinema’s most celebrated genre franchises. Colony stands apart from that franchise, unfolding almost entirely inside a sealed Seoul skyscraper, where survivors contend with a hive-minded strain of the undead capable of neural communication — an ant-colony logic that causes the infected to evolve, listen and eventually speak as the film progresses.
Gianna Jun leads the cast as a biotechnology professor whose conference becomes a nightmare when the outbreak is triggered by a disgruntled former employee, played by Peninsula star Koo Kyo-hwan. Critical reception has been mixed but broadly warm. Screen Daily described the film as “propulsive” and “entertaining,” pulling from anxieties around surveillance and contagion, though noted the story is very straightforward. Variety called it “an enjoyably gnarly splatterfest” with enough practical-effects flourishes to satisfy hardcore genre audiences. Some critics were less forgiving, with Little White Lies arguing the film fell short of Train to Busan’s impact.
Yeon himself has pushed back against the narrative of Korean cinema in crisis. “A lot of people said Korean cinema was going through a crisis, but I never thought of it that way — I just thought it was going through a transformation,” the director said in a recent interview, pointing to the pandemic-era surge in streaming and shortened audience attention spans as structural shifts rather than decline.
The film’s commercial performance supports that view. Six of the ten highest-grossing films in Korea so far this year are domestic productions, with Colony, The King’s Warden, Salmokji, Once We Were Us, Humint and Choir of God all ranking in the top ten. Showbox has sold Colony to more than 120 territories internationally, with Well Go USA handling North America, where it is set for a theatrical release in late August.
