Seo Kang-joon
Acting
Biography
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).
Filmography 34
Movies (6)
A Year-End Medley2021Yi-kang
Summer Snow2015Sang-gyu
The Beauty Inside2015Woo-jin 92
My Love, My Bride2014Joon-soo
Bomi's Room2014Self
Haneuljae’s Murder2013尹河
Shows (28)
A Love Other Than Yours2026Namgung Ho
Boyfriend on Demand2026Seo Eun-ho
Undercover High School2025Jeong Hae-sung
Grid2022Kim Sae-ha
When the Weather Is Fine2020Im Eun-seop
WATCHER2019Kim Young-Koon
The Third Charm2018On Joon Young
Are You Human?2018Nam Shin / Nam Shin III
Busted!2018Kang-Joon Seo
Idol Fever2017Do Yun's older brother
Entourage2016Cha Young-Bin
Entertainer2016Lee Sang-Won
Cheese in the Trap2016Baek In-ho
To Be Continued2015Ah-rin's elder brother
Hwajung2015Hong Joo-won
The Best Future2014Choi Go
What Happens to My Family?2014Yoon Eun-Ho
Roommate2014Self
Cunning Single Lady2014Gook Seung-hyun
The Suspicious Housekeeper2013Choi Soo Hyuk
After School: Lucky or Not2013
Good Doctor2013One of the punks who wants to beat Shi On
Home Alone2013Self
To the Beautiful You2012One of the guys putting ghost makeup on Song Jong Min's group
Law of the Jungle2011
Running Man2010
KBS Drama Special2010
Melon Music Awards2009Messenger