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Seo Kang-joon

Acting Born Oct 12, 1993 Gunpo, Gyeonggi, South Korea 24 credits

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).

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Full filmography

  • Running Man (2010)
  • Home Alone (2013) as Self
  • KBS Drama Special (2010)
  • Law of the Jungle (2011)
  • Undercover High School (2025) as Jeong Hae-sung
  • Busted! (2018) as Kang-Joon Seo
  • Boyfriend on Demand (2026) as Seo Eun-ho
  • Hwajung (2015) as Hong Joo-won
  • When the Weather Is Fine (2020) as Im Eun-seop
  • Are You Human? (2018) as Nam Shin / Nam Shin III
  • Entourage (2016) as Cha Young-Bin
  • Good Doctor (2013) as One of the punks who wants to beat Shi On
  • The Third Charm (2018) as On Joon Young
  • To the Beautiful You (2012) as One of the guys putting ghost makeup on Song Jong Min's group
  • Grid (2022) as Kim Sae-ha
  • The Suspicious Housekeeper (2013) as Choi Soo Hyuk
  • What Happens to My Family? (2014) as Yoon Eun-Ho
  • Roommate (2014) as Self
  • Entertainer (2016) as Lee Sang-Won
  • Cheese in the Trap (2016) as Baek In-ho
  • Cunning Single Lady (2014) as Gook Seung-hyun
  • WATCHER (2019) as Kim Young-Koon
  • Idol Fever (2017) as Do Yun's older brother
  • The Beauty Inside (2015) as Woo-jin 92