Seo Kang-joon
Acting
1993-10-12 · 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).
Filmography(34)
tvA Love Other Than Yours
as Namgung Ho · 2026 · 0.0
tvBoyfriend on Demand
as Seo Eun-ho · 2026 · 8.2
tvUndercover High School
as Jeong Hae-sung · 2025 · 8.0
tvGrid
as Kim Sae-ha · 2022 · 7.0
movieA Year-End Medley
as Yi-kang · 2021 · 7.2
tvWhen the Weather Is Fine
as Im Eun-seop · 2020 · 7.3
tvWATCHER
as Kim Young-Koon · 2019 · 7.9
tvThe Third Charm
as On Joon Young · 2018 · 6.2
tvAre You Human?
as Nam Shin / Nam Shin III · 2018 · 8.1
tvBusted!
as Kang-Joon Seo · 2018 · 7.8
tvIdol Fever
as Do Yun's older brother · 2017 · 1.0
tvEntourage
as Cha Young-Bin · 2016 · 7.7
tvEntertainer
as Lee Sang-Won · 2016 · 6.6
tvCheese in the Trap
as Baek In-ho · 2016 · 7.0
movieSummer Snow
as Sang-gyu · 2015 · 7.0
movieThe Beauty Inside
as Woo-jin 92 · 2015 · 7.7
tvTo Be Continued
as Ah-rin's elder brother · 2015 · 5.5
tvHwajung
as Hong Joo-won · 2015 · 4.5
tvThe Best Future
as Choi Go · 2014 · 7.4
movieMy Love, My Bride
as Joon-soo · 2014 · 6.9
movieBomi's Room
as Self · 2014 · 0.0
tvWhat Happens to My Family?
as Yoon Eun-Ho · 2014 · 7.8
tvRoommate
as Self · 2014 · 8.2
tvCunning Single Lady
as Gook Seung-hyun · 2014 · 7.5