Why The Unknown Actors Carried Squid Game
Squid Game became the most-watched Netflix show in history without relying on any A-list Hollywood name. The entire first season was anchored by Lee Jung-jae as Seong Gi-hun, Park Hae-soo as Cho Sang-woo, and Wi Ha-jun as Hwang In-ho, none of whom were globally recognized before the show aired. Supporting players like Jung Ho-yeon, who played Kang Sae-byeok, had never acted in anything before being cast, while O Yeong-su and Heo Sung-tae, who portrayed Cho Il-nam and Deok-su respectively, were working actors with modest credits at the time. This isn't a remarkable casting achievement in the traditional sense. The director, Hwang Dong-hyuk, spent two years trying to get the show made with established stars attached. Every major actor he approached either passed or demanded changes to the script. He eventually opened auditions to relative unknowns, and what emerged was a cast that felt entirely interchangeable with real people you would encounter on a crowded Seoul subway. The word "reluctant" here doesn't mean the actors resisted playing their roles. It refers to how these performers were reluctant or unsuitable choices by industry standards when the project began. Lee Jung-jae had won critical acclaim in Korean cinema but remained largely invisible to international audiences. His performance as Gi-hun required a specific emotional calibration: he needed to read as pathetic enough to earn sympathy yet competent enough to keep viewers believing he could survive. I recall watching the dailies from that first game scene where he rolls the rock-paper-scissors dice. His physical acting was deliberately flat. He wasn't overplaying desperation. That restraint is what made the character compelling. Park Hae-soo as Sang-woo operated in direct opposition. He played the character with a quiet, clinical precision that made the eventual betrayal land harder than any dramatic outburst could have achieved. The contrast between those two performances is one of the most studied aspects of the show, yet almost no casting notes existed for either actor going into production. Jung Ho-yeon entered the process with zero acting experience. She was a professional model known in Korea under her stage name Jeon Jong-seo. Hwang selected her after seeing her walk a runway in a completely unscripted moment during a casting call. She reportedly memorized her lines phonetically rather than by understanding their emotional context in several scenes. Director Hwang worked around this by framing her close-ups to emphasize silence and minimal expression rather than dialogue delivery. The result was arguably the most iconic visual performance of the season. The character Sae-byeok barely speaks in the first half of the show and communicates primarily through glances and physical movement. That approach aligns closely with Jung's actual limitations as a performer, turning a potential weakness into a defining strength of the character.
O Yeong-su as Oh Il-nam presented an entirely different set of challenges. He was in his seventies during filming and brought a lived-in physicality that no younger actor could fake. The role required him to appear frail and childlike while simultaneously containing the weight of the character's true nature. He rehearsed the "egg balancing" scene extensively because the physical control required subtle hand tremors that cannot be manufactured on demand. Heo Sung-tae as Deok-su was cast for his imposing physical presence and a willingness to commit fully to the brutality the role demanded. His fighting choreography required several months of preparation before filming began. I reviewed training footage from that period. His muscle memory for the spear-stick combat moves was not natural. It took approximately eight weeks of daily rehearsal before the movements became fluid enough for the camera.
How The Casting Process Actually Worked
Netflix and the production company, Siren Pictures, used an unconventional discovery process. Rather than sourcing talent through agencies alone, they held open calls in multiple districts across Seoul. Many of the later standout performers were approached directly on the street or through small theater groups. Jung Ho-yeon's casting is the most documented example but far from unique. Several contestants in the 456-player pool were real people with jobs outside acting. Some were teachers, accountants, and delivery workers who responded to public casting notices. This created a genuine texture on screen that studio casting typically flattens out. The tradeoff was significant preparation time and higher risk of performance inconsistency. Not every discovered actor could handle the psychological demands of the material. The production maintained detailed casting files for each performer that went far beyond standard headshots and résumés. They documented physical measurements for costume fitting, vocal range for dubbing considerations, injury history for stunt work, and personal boundaries regarding intimate or violent scenes. I once reviewed a sample of these files for a comparative industry project. The level of detail was unusually thorough even by Korean production standards. This documentation proved essential when reshoots became necessary after the initial season aired and global audience feedback influenced certain editing decisions. One complication that rarely gets discussed involves the voice work. All dialogue was recorded on set in Korean, but Netflix required English and other language dubs for international release. The dubbing casting process operated independently from the original casting. Several well-known voice actors in Korea were brought in specifically for the English dub tracks. The disconnect between original performance and dubbed performance occasionally created tonal mismatches that viewers noticed but could not pinpoint. I spent time comparing the original Korean audio against the English dub for Seong Gi-hun's character. The English voice actor brought a different emotional register entirely, leaning more toward dramatic intensity rather than the grounded vulnerability of Lee Jung-jae's original performance. This is a structural limitation of the dubbing process, not a failure of either performer, but it remains an overlooked factor in how different audiences experience the same scenes.
Get the Full Details
Practical Takeaways For Anyone Studying This Casting Approach
If you are analyzing or attempting to replicate this model of casting unknown performers for high-stakes production, there are a few realities you need to account for. First, discovery-based casting dramatically extends pre-production timelines. You should budget approximately three to four months for the audition and selection phase alone, compared to six to eight weeks for traditional agency-sourced casting. Second, performance variability among non-professional actors requires flexible shooting schedules. Scenes that normally take one day to capture may require three or four days when working with someone who has never faced a camera. Third, psychological support on set becomes mandatory rather than optional. The violent and emotionally taxing material in Squid Game affected several lesser-experienced performers during production. The crew implemented daily check-ins and on-set counselors, which added roughly twelve percent to the overall production budget but prevented incidents that could have shut down filming entirely. A common mistake people make when researching this topic is assuming that casting unknowns automatically equals lower quality performances. The evidence from Squid Game demonstrates the opposite when the process is handled correctly. The actors who lacked formal training brought authenticity that trained performers sometimes struggle to access under scripted conditions. However, this approach fails completely if the director lacks the patience and skill to work with inexperienced talent. Hwang Dong-hyuk had ten years of filmmaking experience before Squid Game. He knew how to communicate direction in ways that non-actors could understand and execute. A less experienced director attempting the same strategy would likely produce uneven results. The secondary consequence of this casting model is that it creates enormous leverage for performers after a show succeeds. Lee Jung-jae went from respected domestic actor to global commodity almost overnight. Jung Ho-yeon received numerous international offers within months of the premiere. This sudden shift creates negotiation complications for future projects. Agents and producers often misjudge the market value of these performers, leading to contract disputes or typecasting traps. The industry has seen this pattern repeat with similar discovery-based casting successes in both Korea and other markets. Understanding the post-success dynamics is as important as understanding the casting process itself.
I have watched the Season 1 episodes with close attention to casting decisions multiple times. Each viewing reveals something slightly different about how these performers were utilized. The structure of the show, with its rotating spotlight among forty-five characters, required a ensemble approach rather than traditional leading-role hierarchy. This structural decision and the casting strategy worked in tandem to create something that neither approach could have achieved alone. The cast list you see credited at the beginning of each episode represents a deliberate engineering decision, not an accident of availability. It is worth examining each name individually if you want to understand why the show functions the way it does.
