Seo Kang-joon
Acting
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
Acting34
tvA Love Other Than Yours
2026
Namgung Ho
tvBoyfriend on Demand
2026
Seo Eun-ho
tvUndercover High School
2025
Jeong Hae-sung
tvGrid
2022
Kim Sae-ha
movieA Year-End Medley
2021
Yi-kang
tvWhen the Weather Is Fine
2020
Im Eun-seop
tvWATCHER
2019
Kim Young-Koon
tvThe Third Charm
2018
On Joon Young
tvAre You Human?
2018
Nam Shin / Nam Shin III
tvBusted!
2018
Kang-Joon Seo
tvIdol Fever
2017
Do Yun's older brother
tvEntourage
2016
Cha Young-Bin
tvEntertainer
2016
Lee Sang-Won
tvCheese in the Trap
2016
Baek In-ho
movieSummer Snow
2015
Sang-gyu
movieThe Beauty Inside
2015
Woo-jin 92
tvTo Be Continued
2015
Ah-rin's elder brother
tvHwajung
2015
Hong Joo-won
tvThe Best Future
2014
Choi Go
movieMy Love, My Bride
2014
Joon-soo
tvWhat Happens to My Family?
2014
Yoon Eun-Ho
tvRoommate
2014
Self
tvCunning Single Lady
2014
Gook Seung-hyun
tvThe Suspicious Housekeeper
2013
Choi Soo Hyuk
tvGood Doctor
2013
One of the punks who wants to beat Shi On
tvHome Alone
2013
Self
tvTo the Beautiful You
2012
One of the guys putting ghost makeup on Song Jong Min's group
tvMelon Music Awards
2009
Messenger