Seo Kang-joon
Known for: Acting
Born: October 11, 1993 in Gunpo, Gyeonggi, South Korea
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
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Bomi's Room
Self
My Love, My Bride
Joon-soo
The Beauty Inside
Woo-jin 92
Summer Snow
Sang-gyu
A Year-End Medley
Yi-kang
Haneuljae’s Murder
尹河
Law of the Jungle
Cunning Single Lady
Gook Seung-hyun
Hwajung
Hong Joo-won
Grid
Kim Sae-ha
The Suspicious Housekeeper
Choi Soo Hyuk
Roommate
Self
Cheese in the Trap
Baek In-ho
Entourage
Cha Young-Bin
To Be Continued
Ah-rin's elder brother
Running Man
Idol Fever
Do Yun's older brother
Entertainer
Lee Sang-Won
Good Doctor
One of the punks who wants to beat Shi On
To the Beautiful You
One of the guys putting ghost makeup on Song Jong Min's group
What Happens to My Family?
Yoon Eun-Ho
Are You Human?
Nam Shin / Nam Shin III
The Third Charm
On Joon Young
