Squid Game S1 Cast: Actors and Characters Explained

Squid Game S1 features an ensemble that blends screen veterans with breakout newcomers. The central players include Lee Jung-jae as Seong Gi-hun, Park Hae-soo as Cho Sang-woo, Jung Ho-yeon as Kang Sae-byeok, Wi Ha-joon as Hwang Jun-ho, Oh Young-soo as Oh Il-nam, Heo Sung-tae as Jang Deok-su, Kim Joo-ryoung as Han Mi-nyeo, and Anupam Tripathi as Ali Abdul. Key figures outside the arena include Lee Byung-hun as the Front Man and Gong Yoo as the mysterious Salesman, with Lee Yoo-mi delivering a standout turn as Ji-yeong. Below is a complete guide to the main characters, what they do in the game, and where you may have seen the actors before.

Main Cast and Characters

Lee Jung-jae as Seong Gi-hun (Player 456)

Lee Jung-jae anchors the series with a layered performance as Seong Gi-hun, a down-on-his-luck chauffeur and father whose debts pull him into the games. A screen fixture since the 1990s, Lee built his reputation with acclaimed films like The Housemaid, New World, and Assassination. He later headlined the political thriller series Chief of Staff, directed and starred in the spy film Hunt, and joined the Star Wars universe with The Acolyte. His turn in Squid Game earned him the 2022 Emmy for Outstanding Lead Actor in a Drama Series.

Gi-hun starts as a compulsive gambler and a disappointment to his daughter. Inside the arena, his decency keeps breaking through even when the rules reward ruthlessness. He builds alliances, mourns losses, and clings to a moral center as the violence escalates. By the final game, he carries the weight of every choice, and his survival forces him to reckon with the people behind the spectacle.

Lee’s career highlights include his transformation in New World, which showcased his ability to play conflicted men walking a tightrope between power and conscience. Squid Game pushed that further, setting a new global stage for the actor and confirming his range from intimate character beats to high-stakes suspense.

Park Hae-soo as Cho Sang-woo (Player 218)

Park Hae-soo brings sharp intelligence and a simmering intensity to Cho Sang-woo, a former investment prodigy from the same neighborhood as Gi-hun. Park first broke big on television with Prison Playbook, then headlined Money Heist: Korea – Joint Economic Area and the crime series Narco-Saints. Park’s filmography includes acclaimed projects such as Prison Playbook, Money Heist: Korea – Joint Economic Area, Narco-Saints, and several feature films that showcase his versatility as an actor.

Sang-woo enters the game shrouded in scandal and desperation. Practical to a fault, he calculates every move, often at a moral cost. His decisions during marbles and the glass bridge crystallize the show’s central question: What does survival cost you? As Gi-hun’s foil, he embodies the corrosive logic of the games, and his final confrontation with his childhood friend lands as one of the season’s most bruising emotional blows.

Park’s post-Squid Game slate cemented his leading-man status, with back-to-back Netflix hits and darker, morally tangled roles. He excels at characters who wear authority like armor, then crack under pressure to reveal jagged vulnerability.

Jung Ho-yeon as Kang Sae-byeok (Player 067)

Jung Ho-yeon made one of television’s great debut turns as Kang Sae-byeok, a North Korean defector fighting to reunite her family. Already a recognizable face from global runways, Jung transitioned to acting with startling ease. She swiftly earned a SAG Award for Female Actor in a Drama Series and an Emmy nomination, then lined up major projects like the Apple TV+ series Disclaimer.

Sae-byeok is quiet, watchful, and exacting. She trusts almost no one yet forms a fragile, meaningful bond with Ji-yeong that becomes the heart of the marbles episode. Every decision she makes tracks back to her younger brother and the chance of a life beyond the border. Her arc puts a human face on the high stakes, reminding viewers why the money matters and what it might cost to reach it.

Jung’s performance marked a rare star-is-born moment. She turned minimal dialogue into rich interiority, then paired it with action-readiness that grounded the set pieces. The role set a new ceiling for models-turned-actors in prestige TV.

Wi Ha-joon as Hwang Jun-ho

Wi Ha-joon threads a parallel thriller through the series as Hwang Jun-ho, a determined police officer searching for his missing brother. Offscreen, Wi has built a steady run of standout credits, including the sleeper-hit horror film Gonjiam: Haunted Asylum, the taut chiller Midnight, the prestige drama Little Women, and the crime saga The Worst of Evil.

Jun-ho’s infiltration introduces a detective story inside the survival game. With a stolen mask and a borrowed identity, he documents the operation, peels back its hierarchy, and risks exposure at every turn. His pursuit uncovers a devastating personal truth that reframes the show’s power structure and links law enforcement to a system designed to keep outsiders blind.

Wi’s charisma and physicality sell the undercover sequences, while his quieter scenes add a pulse of empathy. He is the viewer’s camera inside the machine, and his discoveries give the show its world-building spine.

Oh Young-soo as Oh Il-nam (Player 001)

Veteran stage actor Oh Young-soo delivers a deceptively gentle performance as Oh Il-nam, the elderly participant whose warmth steadies the early episodes. With decades in theater and screen work like Spring, Summer, Fall, Winter… and Spring, Oh brought gravitas that helped the series land its emotional punches. He won a Golden Globe for Supporting Actor for this role.

Il-nam presents as a kindly grandfather with a terminal illness who finds joy in children’s games. His bond with Gi-hun during red light, green light and marbles softens the show’s brutality. Then the truth surfaces: he is the hidden architect of the tournament, a wealthy patron who entered the arena for the thrill of mortality. That reveal recontextualizes every smile and every stumble.

Oh’s calm, detailed acting turned a twist into a character study. He avoids caricature, showing how nostalgia and cruelty can live side by side when power dulls consequence.

Heo Sung-tae as Jang Deok-su (Player 101)

Heo Sung-tae leans into menace as Jang Deok-su, a debt-ridden gangster who treats the arena like his personal turf. Heo is no stranger to hard-edged roles, having made waves in The Age of Shadows and The Outlaws, while also impressing in the acclaimed series Beyond Evil and political thriller Hunt.

Deok-su rules by fear. He forms a crew, hoards resources, and thrives when the rules favor brute force. His volatile relationship with Han Mi-nyeo and his choices during the tug-of-war and the chaotic night fight deepen the show’s portrait of predation. On the glass bridge, he learns that control is fleeting when the ground literally falls away.

Heo’s career has tracked a specific niche – villains with volume and texture. He turns Deok-su into more than a bully, showing the paranoia and panic that sit beneath a swaggering exterior.

Kim Joo-ryoung as Han Mi-nyeo (Player 212)

Kim Joo-ryoung is electric as Han Mi-nyeo, a wildcard who swings between bravado and vulnerability. A seasoned character actor, Kim has spent years sharpening her craft across independent films and television dramas, often stealing scenes with precise comic timing and sudden dramatic turns.

Mi-nyeo’s survival instinct is second to none. She bargains, bluffs, and bends alliances, first seeking protection with Deok-su and later asserting herself as a force on her own terms. Her lighter-in-the-bathroom hustle and the way she evens the score on the bridge are emblematic of the show’s scrappy, unpredictable energy.

Kim’s performance redefines the show’s tone whenever she appears. She swings from abrasive to aching without losing sight of Mi-nyeo’s core truth: everything she does is a calculation to live one more day.

Anupam Tripathi as Ali Abdul (Player 199)

Anupam Tripathi brings soulful warmth to Ali Abdul, a migrant worker from Pakistan supporting his family. Before Squid Game, Tripathi logged memorable turns in Korean productions such as the space opera Space Sweepers and the psychological thriller Strangers From Hell, building a reputation as a versatile bilingual performer.

Ali becomes the beating heart of the early episodes. He is earnest, physically strong, and quick to trust, forming a bond with Sang-woo that feels like a life raft in a brutal sea. The marbles game delivers one of the season’s most wrenching betrayals, forcing viewers to sit with the way the system exploits the vulnerable.

Tripathi’s empathetic screen presence made Ali an instant fan favorite. His work helped widen the lens of Korean drama to center a migrant experience with specificity and dignity.

Lee Byung-hun as The Front Man (Hwang In-ho)

Global star Lee Byung-hun embodies quiet authority as the Front Man, the black-masked overseer who runs the island with surgical precision. Lee’s filmography spans Korea and Hollywood, from Joint Security Area and I Saw the Devil to G.I. Joe and Terminator Genisys, as well as the beloved period romance Mr. Sunshine.

The Front Man watches everything, punishes deviation, and answers only to the unseen hosts. His connection to Jun-ho reframes him not as a faceless cog but as a tragic figure welded to the machine. The power he wields reads as both absolute and borrowed, a role taken on at a moral cost that becomes clearer with every reveal.

Lee’s presence enlarges the show’s mythology. He brings menace without theatrics, then layers in the melancholy of a man who traded personhood for purpose.

Gong Yoo as The Salesman

Gong Yoo makes every minute count as the Salesman, a recruiter who slaps strangers awake with a game of ddakji and a wad of cash. Known worldwide for the blockbuster Train to Busan and the cultural juggernaut Goblin, Gong remains one of Korea’s most bankable leading men, also headlining Netflix’s sci-fi series The Silent Sea.

The Salesman appears at the beginning to bait Gi-hun and again later to tease the cycle’s persistence. He is charm weaponized, a smiling invitation to ruin. The suitcase, the card, the rules – all of it flows through him, and his brief scenes linger like a dare.

It is a masterclass in economy. Gong compresses danger and delight into a handshake, setting tone and stakes long before the first gunshot sounds in the arena.

Lee Yoo-mi as Ji-yeong (Player 240)

Lee Yoo-mi quietly devastates as Ji-yeong, a young woman whose friendship with Sae-byeok blossoms just before fate intervenes. After Squid Game, Lee appeared in All of Us Are Dead.

Ji-yeong drifts to the edges at first, then steps into focus during the marbles round. Her backstory unfolds in careful detail, and her choice in that game provides the season with its single most generous act. She becomes the series’ softest voice, arguing that connection can be its own form of resistance.

Lee’s delicacy gives the character a life well beyond her screentime. The role turned her into a household name and signaled a knack for mining the quietest beats for the deepest feeling.

Frequently Asked Questions

Who is Player 001 and what is his real identity?

Player 001 is Oh Il-nam, played by Oh Young-soo. He is later revealed to be a secret founder and host of the games who joined the competition to feel alive, turning his earlier warmth into a chilling mask for power.

Who wins the first season of Squid Game?

Seong Gi-hun, Player 456, survives the final match. His victory comes with profound guilt and a determination to confront the people responsible for the tournament.

Who is the man in the black mask?

The black-masked overseer is the Front Man, revealed to be Hwang In-ho, portrayed by Lee Byung-hun. He runs the island operations and enforces the rules with ruthless efficiency.

What is the game the Salesman plays in the subway?

He plays ddakji, a Korean street game using folded paper tiles. The friendly wager doubles as a recruitment tactic, hooking players with quick cash and a business card that leads to the next step.