Seo Kang-joon
October 12, 1993Gunpo, Gyeonggi, South Korea
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).
Filmography
Boyfriend on Demand
2026 · 8.4
Running Man
2010 · 8.2
Are You Human?
2018 · 8.1
Undercover High School
2025 · 8.0
Good Doctor
2013 · 8.0
WATCHER
2019 · 8.0
Busted!
2018 · 7.8
What Happens to My Family?
2014 · 7.8
Entourage
2016 · 7.7
Cunning Single Lady
2014 · 7.6
The Beauty Inside
2015 · 7.6
The Best Future
2014 · 7.5
KBS Drama Special
2010 · 7.4
When the Weather Is Fine
2020 · 7.4
A Year-End Medley
2021 · 7.2
Cheese in the Trap
2016 · 7.0
Grid
2022 · 7.0
My Love, My Bride
2014 · 6.9
To the Beautiful You
2012 · 6.8
Entertainer
2016 · 6.6
The Third Charm
2018 · 6.2
Law of the Jungle
2011 · 5.5
To Be Continued
2015 · 5.5
A Love Other Than Yours
2026 · 5.4
The Suspicious Housekeeper
2013 · 5.0
After School: Lucky or Not
2013 · 4.7
Hwajung
2015 · 4.5
Idol Fever
2017 · 1.0
Melon Music Awards
2009 · 0.0
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Nambeol
— · 0.0