TVBoyfriend on Demand
2026★ 8.3
Acting
Seo Kang-joon
1993-10-12 · Gunpo, 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).
Known for
TV
TVRunning Man
2010★ 8.2
TVRoommate
2014★ 8.2
TVAre You Human?
2018★ 8.1
TVUndercover High School
2025★ 8.0
TVGood Doctor
2013★ 8.0
TVWATCHER
2019★ 7.9
TVWhat Happens to My Family?
2014★ 7.8
TVBusted!
2018★ 7.8
TVEntourage
2016★ 7.7
MovieThe Beauty Inside
2015★ 7.6
TVCunning Single Lady
2014★ 7.6
TVHome Alone
2013★ 7.5
TVKBS Drama Special
2010★ 7.4
TVThe Best Future
2014★ 7.4