The cast ofGood Boyincludes famous South Korean actors you’ve probably seen in other K-dramas. Directed by Shim Na-yeon, who is known for her work onBeyond Evil,Good Boycenters around ex-Olympic medalists and sports champions. After their careers come to an end, the athletes join the police force and help bring criminals to justice.Good Boyis the perfect example of whyKorean TV showshave been receiving positive reviews from both domestic and international critics and audiences.
The series manages to blend humor with action in an effortless way, while also having emotional depth. But perhaps the best thing about theaction-packed K-dramais how well the actors embody their characters. The main and supporting cast ofGood Boyis absolutely remarkable, and they do an incredible job of bringing Lee Dae-il’s story to life. Everything in the TV show comes together nicely, from the show’s pacing to its intriguing premise, and it’s mostly thanks to the K-drama’s talented cast.
Park Bo-gum as Yoon Dong-ju
Date Of Birth: June 10, 2025
Actor:Born in Seoul, South Korea,Park Bo-gum starred in a variety of K-dramas in supporting roles before he made it big in the critically acclaimedReply 1988. The actor is famous for appearing inLove in the Moonlight, where he played the lead role,Encounter, andRecord of Youth. Recently, Park Bo-gum collaborated with IU onWhen Life Gives You Tangerines.
Love in the Moonlight
Seobok
Seo Bok
Character:InGood Boy, Park Bo-gum takes on the role of Yoon Dong-ju, a former boxer turned police officer. Dong-ju is funny, a bit childish, and has a soft spot for Ji Han-na. He uses his boxing skills to help catch a notorious gang member.
Kim So-hyun as Ji Han-na
Date Of Birth: July 12, 2025
Actor:Kim So-hyun was born in Australia. In 2012,the actor had a career-changing role in the fantasy K-drama,Moon Embracing the Sun. She went on to star inRiver Where the Moon Rises,My Lovely Liar, andLove Alarm. The award-winning actor has also had roles inGuardian,While You Were Sleeping, andBring It On, Ghost.
River Where the Moon Rises
Princess Pyeong-kang
Character:Like the rest of the main characters inGood Boy, Ji Han-na used to be a decorated athlete. She was a shooting champion whose career was unfortunately cut short. After she became a police officer, all she wanted was to be in the field, but her bosses thought she belonged behind the desk.
Oh Jung-se as Min Ju-yeong
Date Of Birth: August 18, 2025
Actor:Born in Uiryeong County, South Gyeongsang Province, South Korea, Oh Jung-se has had a long and impressive acting career. Although the actor has been on the acting scene for a while, it’s his role in the 2017 film,Fabricted City, that gained him critical and audience acclaim. Oh Jung-se is known for his roles inIt’s Okay to Not Be Okay,When the Camellia Blooms,Sweet Home, andThe Call.
Swing Kids
Kang Byung-sam
Character:Min Ju-yeong is a 7th-grade civil servant at the Korea Customs Service. Initially, it might seem like he is a good guy who loves his job, but there’s more to him than meets the eye.
Lee Sang-yi as Kim Jong-hyeon
Date Of Birth: August 07, 2025
Actor:Lee Sang-yi was born in Ansan, Gyeonggi, South Korea. Before he made it big in movies and TV shows, Lee Sang-yi was a stage actor. HisTV breakthrough came after he starred in the 2020 series,Once Again. The actor is known for starring inBloodhounds,Hometown Cha-Cha-Cha,When the Camellia Blooms, andMy Demon.
Hometown Cha-Cha-Cha
Ji Seong-hyeon
Character:Lee Sang-yi plays Kim Jong-hyeon inGood Boy. Jong-hyeon, a silver medalist fencer, used to date Han-na. He becomes a police officer to be closer to her, but ends up facing many challenges at work.
Date Of Birth: August 02, 2025
Active Since:2011
Actor:Born in Busan, South Korea,Heo Sung-tae made it big after starring in the historical K-drama, The Age of Shadows. The actor has hadroles inSquid Game, where he played Jeong Dok-su,The Silent Sea, andDecoy. Heo Sung-tae’s other notable movies and TV shows includeBehind Every Star,Big Bet, andBloody Heart.
Bloody Heart
Cho Won-pyo
Character:Ko Man-sik is a sort of mentor to Dong-ju as he is the one who taught him how to box. When the ex-wrestler fails to catch the gang member, the Golden Bunny, he is forced to partner up with Dong-ju to put the criminal behind bars.
Tae Won-seok as Shin Jae-hong
Date Of Birth: July 07, 2025
Actor: Tae Won-seok was born in South Korea.The actor nailed his role as Do Jin-woong in the 2018 K-drama,Player, which gained him recognition and put him on the map. Tae Won-seok has appeared inBloodhounds,Sisyphus: The Myth, andNobody Knows.
Bloodhounds
Kang In-beom
Character:Rounding up the team of former athletes is Shin Jae-hong, played by Tae Won-seok. Jae-hong is kindhearted and isn’t as eager to be part of the special police force. However, he is still an important member of the team as his gentleness helps even out the loud personalities.
Good Boy Supporting Cast & Characters
Seo Hyun-chul as Hwang Gyeong-cheol:Seo Hyun-chul doesn’t have an extensive acting resume, but it’s nonetheless impressive. The actor has had roles in popular K-dramas and Korean movies such asWelcome to Samdalri,The First Responders, andThe Gifted Hands.
Kang Gil-woo as Lee Sang-gon:Kang Gil-woo plays the leader of the Bunny Gang, Lee Sang-gon, inGood Boy. The actor is mostly recognized for his roles inMy Dearest,Welcome to Samdalri, andBroker.
Jung Man-sik as Oh Jong-gu:The South Korean actor, Jung Man-sik, has had roles in a variety of movies and TV shows. He has starred inThe Worst of Evil,Gangnam B-side, andMan to Man.
Seo Jeong-yeon as Jeong Mi-ja:Born on 14 August 2025, Seo Jeong-yeon has an impressive acting resume. Her notable K-dramas includeDescendants of the Sun,My Demon, andCastaway Divas. She’s also appeared in the Korean film,Road to Boston.
Park Chul-min as Kim Geum-nam:With over 113 credits to his name, there’s probably a K-drama or Korean film you’ve seen Park Chul-min in. The actor has starred in the critically acclaimedYouth of May,The Villainess, andMay 18.
Seo Jae-hee as Jin Gyeong-sook:Seo Jae-hee hasn’t appeared in a lot of K-dramas. But the ones she’s had roles in, includingNevertheless,The Kidnapping Day, andTwenty Five Twenty One, have been successful with both audiences and critics.
