Seo Kang-joon
Known for
Born in Gunpo in 1993, Seo Kang-joon is a South Korean actor who came up through the boy band 5urprise before establishing himself in television. He drew wide notice as Baek In-ho in the youth romance Cheese in the Trap (2016), then anchored the sci-fi series Are You Human Too? (2018) in a demanding dual role as a man and the android built to replace him. He led the crime drama The Third Charm (2018) and later the fantasy Grid (2022), continuing to alternate between romance and genre pieces. He is regarded as one of the more introspective leading men of his generation of K-drama actors.
Seo Kang-joon
5 Movies
20 Series
Born in Gunpo in 1993, Seo Kang-joon is a South Korean actor who came up through the boy band 5urprise before establishing himself in television. He drew wide notice as Baek In-ho in the youth romance Cheese in the Trap (2016), then anchored the sci-fi series Are You Human Too? (2018) in a demanding dual role as a man and the android built to replace him. He led the crime drama The Third Charm (2018) and later the fantasy Grid (2022), continuing to alternate between romance and genre pieces. He is regarded as one of the more introspective leading men of his generation of K-drama actors.
TV Shows
Plays Yoon Eun-Ho
What Happens to My Family?
2014
Plays Hong Joo-won
Hwajung
2015
Plays Nam Shin / Nam Shin III
Are You Human?
2018
Plays Choi Soo Hyuk
The Suspicious Housekeeper
2013
Plays Gook Seung-hyun
Cunning Single Lady
2014
Plays Baek In-ho
Cheese in the Trap
2016
Plays Cha Young-Bin
Entourage
2016
Plays On Joon Young
The Third Charm
2018
Plays Kim Young-Koon
WATCHER
2019
Plays Im Eun-seop
When the Weather Is Fine
2020
Plays Namgung Ho
A Love Other Than Yours
2026
Plays Ah-rin's elder brother
To Be Continued
2015
Plays Jeong Hae-sung
Undercover High School
2025
Plays Kim Sae-ha
Grid
2022
Plays Choi Go
The Best Future
2014
Plays Seo Eun-ho
Boyfriend on Demand
2026
Plays One of the guys putting ghost makeup on Song Jong Min's group
To the Beautiful You
2012
Plays Lee Sang-Won
Entertainer
2016
Plays One of the punks who wants to beat Shi On
Good Doctor
2013
Plays Kang-Joon Seo
Busted!
2018
Latest Trailers
Watch Trailer
A Year-End Medley
Full Filmography
Boyfriend on Demand
Seo Eun-ho · 5 episodes
2026
TV
A Love Other Than Yours
Namgung Ho · 14 episodes
2026–
TV
Undercover High School
Jeong Hae-sung · 12 episodes
2025–
TV
Grid
Kim Sae-ha · 10 episodes
2022
TV
A Year-End Medley
Yi-kang
2021
Film
When the Weather Is Fine
Im Eun-seop · 16 episodes
2020–
TV
WATCHER
Kim Young-Koon · 16 episodes
2019–
TV
Busted!
Kang-Joon Seo · 1 episode
2018
TV
The Third Charm
On Joon Young · 16 episodes
2018–
TV
Photos
Frequently Asked Questions
How old is Seo Kang-joon and where are they from?
Seo Kang-joon is 32 years old, born on October 12, 1993 in Gunpo, Gyeonggi, South Korea.
What are the most famous roles of Seo Kang-joon?
Seo Kang-joon is best known for roles in The Beauty Inside, A Year-End Medley, My Love, My Bride.
How many movies has Seo Kang-joon been in?
Over a 13-year career (since 2013), Seo Kang-joon has appeared in 5 movies and 20 TV shows.
What was Seo Kang-joon's first movie?
The career of Seo Kang-joon began with Haneuljae’s Murder (2013).
What is Seo Kang-joon's most recent movie or series?
Seo Kang-joon's most recent release is Boyfriend on Demand, which premiered on March 6, 2026.
What TV shows has Seo Kang-joon appeared in?
On television, Seo Kang-joon has appeared in Are You Human?, Running Man, Boyfriend on Demand, Cheese in the Trap.
Seo Kang-joon
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).