Seo Kang-joon
23 dramas in our catalogue
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).
Dramas
A Love Other Than Yours
as Namgung Ho
Boyfriend on Demand
as Seo Eun-ho
Undercover High School
as Jeong Hae-sung
Grid
as Kim Sae-ha
When the Weather Is Fine
as Im Eun-seop
WATCHER
as Kim Young-Koon
The Third Charm
as On Joon Young
Are You Human?
as Nam Shin / Nam Shin III
Busted!
as Kang-Joon Seo
Idol Fever
as Do Yun's older brother
Entourage
as Cha Young-Bin
Entertainer
as Lee Sang-Won
Cheese in the Trap
as Baek In-ho
To Be Continued
as Ah-rin's elder brother
Hwajung
as Hong Joo-won
The Best Future
as Choi Go
What Happens to My Family?
as Yoon Eun-Ho
Cunning Single Lady
as Gook Seung-hyun
The Suspicious Housekeeper
as Choi Soo Hyuk
After School: Lucky or Not
2013
Good Doctor
as One of the punks who wants to beat Shi On
To the Beautiful You
as One of the guys putting ghost makeup on Song Jong Min's group
KBS Drama Special
2010