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