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).
Acting credits 20 titles
A Love Other Than Yours
as Namgung Ho
Series
2026
5.3
Undercover High School
as Jeong Hae-sung
Series
2025
8.0
Grid
as Kim Sae-ha
Series
2022
6.9
A Year-End Medley
as Yi-kang
Film
2021
7.2
When the Weather Is Fine
as Im Eun-seop
Series
2020
7.3
WATCHER
as Kim Young-Koon
Series
2019
7.9
The Third Charm
as On Joon Young
Series
2018
6.2
Are You Human?
as Nam Shin / Nam Shin III
Series
2018
8.1
Idol Fever
as Do Yun's older brother
Series
2017
1.0
Entourage
as Cha Young-Bin
Series
2016
7.7
Cheese in the Trap
as Baek In-ho
Series
2016
7.0
The Beauty Inside
as Woo-jin 92
Film
2015
7.6
To Be Continued
as Ah-rin's elder brother
Series
2015
5.5
Hwajung
as Hong Joo-won
Series
2015
4.5
The Best Future
as Choi Go
Series
2014
7.4
What Happens to My Family?
as Yoon Eun-Ho
Series
2014–2015
7.8
Roommate
as Self
Series
2014–2015
8.2
Cunning Single Lady
as Gook Seung-hyun
Series
2014
7.6
The Suspicious Housekeeper
as Choi Soo Hyuk
Series
2013
5.0
After School: Lucky or Not
Series
2013–2014
4.7
이 필터에 맞는 작품이 없어요.
아직 발표된 작품이 없어요.
대표작
5.3
Series
A Love Other Than Yours
Namgung Ho
2026
8.0
Series
Undercover High School
Jeong Hae-sung
2025
7.8
Series
What Happens to My Family?
Yoon Eun-Ho
2014–2015
7.3
Series
When the Weather Is Fine
Im Eun-seop
2020
6.2
Series
The Third Charm
On Joon Young
2018
4.5
Series
Hwajung
Hong Joo-won
2015
7.9
Series
WATCHER
Kim Young-Koon
2019
8.1
Series
Are You Human?
Nam Shin / Nam Shin III
2018
6.9
Series
Grid
Kim Sae-ha
2022
5.0
Series
The Suspicious Housekeeper
Choi Soo Hyuk
2013
7.7
Series
Entourage
Cha Young-Bin
2016
8.2
Series
Roommate
Self
2014–2015
7.6
Film
The Beauty Inside
Woo-jin 92
2015
7.6
Series
Cunning Single Lady
Gook Seung-hyun
2014
7.0
Series
Cheese in the Trap
Baek In-ho
2016
1.0
Series
Idol Fever
Do Yun's older brother
2017
5.5
Series
To Be Continued
Ah-rin's elder brother
2015
7.2
Film
A Year-End Medley
Yi-kang
2021
4.7
Series
After School: Lucky or Not
2013–2014
7.4
Series
The Best Future
Choi Go
2014