Seo Kang-joon
Acting
34
Acting Credits
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).
Known For
Filmography
Boyfriend on Demand
2026
as Seo Eun-ho
A Love Other Than Yours
2026
as Namgung Ho
Undercover High School
2025
as Jeong Hae-sung
Grid
2022
as Kim Sae-ha
A Year-End Medley
2021
as Yi-kang
When the Weather Is Fine
2020
as Im Eun-seop
WATCHER
2019
as Kim Young-Koon
Are You Human?
2018
as Nam Shin / Nam Shin III
The Third Charm
2018
as On Joon Young
Busted!
2018
as Kang-Joon Seo
Idol Fever
2017
as Do Yun's older brother
Cheese in the Trap
2016
as Baek In-ho
Entourage
2016
as Cha Young-Bin
Entertainer
2016
as Lee Sang-Won
The Beauty Inside
2015
as Woo-jin 92
Summer Snow
2015
as Sang-gyu
Hwajung
2015
as Hong Joo-won
To Be Continued
2015
as Ah-rin's elder brother
Bomi's Room
2014
as Self
My Love, My Bride
2014
as Joon-soo
Cunning Single Lady
2014
as Gook Seung-hyun
Roommate
2014
as Self
What Happens to My Family?
2014
as Yoon Eun-Ho
The Best Future
2014
as Choi Go
Haneuljae’s Murder
2013
as 尹河
The Suspicious Housekeeper
2013
as Choi Soo Hyuk
Good Doctor
2013
as One of the punks who wants to beat Shi On
After School: Lucky or Not
2013
Home Alone
2013
as Self
To the Beautiful You
2012
as One of the guys putting ghost makeup on Song Jong Min's group
Law of the Jungle
2011
Running Man
2010
KBS Drama Special
2010
Melon Music Awards
2009
as Messenger