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).
As actor 34
Running Man
2010
Home Alone
2013
Law of the Jungle
2011
A Love Other Than Yours
2026
KBS Drama Special
2010
Busted!
2018
Boyfriend on Demand
2026
Hwajung
2015
Roommate
2014
Undercover High School
2025
Are You Human?
2018
What Happens to My Family?
2014
When the Weather Is Fine
2020
Cheese in the Trap
2016
Good Doctor
2013
To the Beautiful You
2012
Entourage
2016
The Third Charm
2018
Cunning Single Lady
2014
The Suspicious Housekeeper
2013
Grid
2022
Entertainer
2016
WATCHER
2019
Idol Fever
2017
Melon Music Awards
2009
To Be Continued
2015
The Beauty Inside
2015
After School: Lucky or Not
2013
A Year-End Medley
2021
My Love, My Bride
2014
The Best Future
2014
Summer Snow
2015
Haneuljae’s Murder
2013
Bomi's Room
2014