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