Seo Kang-joon
Known for acting · Born 12 October 1993 · 32 · Gunpo, Gyeonggi, South Korea
34 credits
Lee Seung-hwan (born October 12, 1993), known professionally as Seo Kang-joon, is a South Korean actor and former singer, who was a member of the group 5urprise. He gained recognition with his role in the television series Cheese in the Trap (2016) and has since starred in Are You Human? (2018), Watcher (2019), When The Weather Is Fine (2020), Grid (2022), Undercover High School (2025), and Boyfriend on Demand (2026).
Known for
Are You Human?
2018
What Happens to My Family?
2014
Hwajung
2015
Cheese in the Trap
2016
Roommate
2014
When the Weather Is Fine
2020
Undercover High School
2025
Cunning Single Lady
2014
A Year-End Medley
2021
WATCHER
2019
The Third Charm
2018
To Be Continued
2015
Acting (34)
2026Boyfriend on DemandSeo Eun-ho · 5 episodesSeries
2026A Love Other Than YoursNamgung Ho · 14 episodesSeries
2025Undercover High SchoolJeong Hae-sung · 12 episodesSeries
2022GridKim Sae-ha · 10 episodesSeries
2021A Year-End MedleyYi-kangFilm
2020When the Weather Is FineIm Eun-seop · 16 episodesSeries
2019WATCHERKim Young-Koon · 16 episodesSeries
2018Are You Human?Nam Shin / Nam Shin III · 36 episodesSeries
2018Busted!Kang-Joon SeoSeries
2018The Third CharmOn Joon Young · 16 episodesSeries
2017Idol FeverDo Yun's older brother · 10 episodesSeries
2016Cheese in the TrapBaek In-ho · 16 episodesSeries
2016EntertainerLee Sang-Won · 2 episodesSeries
2016EntourageCha Young-Bin · 16 episodesSeries
2015The Beauty InsideWoo-jin 92Film
2015To Be ContinuedAh-rin's elder brother · 12 episodesSeries
2015HwajungHong Joo-won · 50 episodesSeries
2015Summer SnowSang-gyuFilm
2014My Love, My BrideJoon-sooFilm
2014The Best FutureChoi Go · 5 episodesSeries
2014Cunning Single LadyGook Seung-hyun · 16 episodesSeries
2014What Happens to My Family?Yoon Eun-Ho · 53 episodesSeries
2014RoommateSelf · 46 episodesSeries
2014Bomi's RoomSelfFilm
2013Good DoctorOne of the punks who wants to beat Shi OnSeries
2013Home AloneSelfSeries
2013The Suspicious HousekeeperChoi Soo Hyuk · 20 episodesSeries
2013After School: Lucky or Not · 24 episodesSeries
2013Haneuljae’s Murder尹河Film
2012To the Beautiful YouOne of the guys putting ghost makeup on Song Jong Min's group · 3 episodesSeries
2011Law of the Jungle · 9 episodesSeries
2010Running ManSeries
2010KBS Drama SpecialSeries
2009Melon Music AwardsMessengerSeries