Seo Kang-joon
Born: 1993-10-12 in Gunpo, Gyeonggi, South Korea
Known For: Acting
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
2026
- Boyfriend on Demand as Seo Eun-ho
- A Love Other Than Yours as Namgung Ho
2025
- Undercover High School as Jeong Hae-sung
2022
- Grid as Kim Sae-ha
2021
- A Year-End Medley as Yi-kang
2020
- When the Weather Is Fine as Im Eun-seop
2019
- WATCHER as Kim Young-Koon
2018
- Busted! as Kang-Joon Seo
- Are You Human? as Nam Shin / Nam Shin III
- The Third Charm as On Joon Young
2017
- Idol Fever as Do Yun's older brother
2016
- Cheese in the Trap as Baek In-ho
- Entourage as Cha Young-Bin
- Entertainer as Lee Sang-Won
2015
- Hwajung as Hong Joo-won
- The Beauty Inside as Woo-jin 92
- To Be Continued as Ah-rin's elder brother
- Summer Snow as Sang-gyu
2014
- What Happens to My Family? as Yoon Eun-Ho
- Cunning Single Lady as Gook Seung-hyun
- Roommate as Self
- The Best Future as Choi Go
- My Love, My Bride as Joon-soo
- Bomi's Room as Self
2013
- Home Alone as Self
- Good Doctor as One of the punks who wants to beat Shi On
- The Suspicious Housekeeper as Choi Soo Hyuk
- After School: Lucky or Not
- Haneuljae’s Murder as 尹河
2012
- To the Beautiful You as One of the guys putting ghost makeup on Song Jong Min's group
2011
2009
- Melon Music Awards as Messenger