Boyfriend on Demand (8.5)
Show · 2026
as Seo Eun-ho
Seo Kang-joon
Born on October 12, 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).
Are You Human? (8.1)
Show · 2018
as Nam Shin / Nam Shin III
Undercover High School (8.0)
Show · 2025
as Jeong Hae-sung
WATCHER (7.9)
Show · 2019
as Kim Young-Koon
What Happens to My Family? (7.8)
Show · 2014
as Yoon Eun-Ho
Entourage (7.7)
Show · 2016
as Cha Young-Bin
The Beauty Inside (7.6)
Movie · 2015
as Woo-jin 92
Cunning Single Lady (7.6)
Show · 2014
as Gook Seung-hyun
The Best Future (7.5)
Show · 2014
as Choi Go
When the Weather Is Fine (7.4)
Show · 2020
as Im Eun-seop
A Year-End Medley (7.2)
Movie · 2021
as Yi-kang
Cheese in the Trap (7.0)
Show · 2016
as Baek In-ho
Grid (6.9)
Show · 2022
as Kim Sae-ha
My Love, My Bride (6.9)
Movie · 2014
as Joon-soo
To the Beautiful You (6.8)
Show · 2012
as One of the guys putting ghost makeup on Song Jong Min's group
The Third Charm (6.2)
Show · 2018
as On Joon Young
To Be Continued (5.5)
Show · 2015
as Ah-rin's elder brother
Hwajung (4.5)
Show · 2015
as Hong Joo-won