Seo Kang-joon — Movies, TV Shows & Where to Watch | Watchly

Seo Kang-joon

Seo Kang-joon

ActingBorn: October 12, 1993in 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).

A Love Other Than Yours

A Love Other Than Yours

as Namgung Ho

Boyfriend on Demand

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Boyfriend on Demand

as Seo Eun-ho

Undercover High School

Undercover High School

as Jeong Hae-sung

Grid

Grid

as Kim Sae-ha

A Year-End Medley

A Year-End Medley

as Yi-kang

When the Weather Is Fine

When the Weather Is Fine

as Im Eun-seop

WATCHER

WATCHER

as Kim Young-Koon

The Third Charm

The Third Charm

as On Joon Young

Are You Human?

Are You Human?

as Nam Shin / Nam Shin III

Busted!

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Busted!

as Kang-Joon Seo

Idol Fever

Idol Fever

as Do Yun's older brother

Entourage

Entourage

as Cha Young-Bin

Entertainer

Entertainer

as Lee Sang-Won

Cheese in the Trap

Cheese in the Trap

as Baek In-ho

Summer Snow

Summer Snow

as Sang-gyu

The Beauty Inside

The Beauty Inside

as Woo-jin 92

To Be Continued

To Be Continued

as Ah-rin's elder brother

Hwajung

Kocowa Amazon Channel

Hwajung

as Hong Joo-won

The Best Future

The Best Future

as Choi Go

My Love, My Bride

Fandango At Home

My Love, My Bride

as Joon-soo

Bomi's Room

Bomi's Room

as Self

What Happens to My Family?

Kocowa Amazon Channel

What Happens to My Family?

as Yoon Eun-Ho

Roommate

Roommate

as Self

Cunning Single Lady

Cunning Single Lady

as Gook Seung-hyun

Haneuljae’s Murder

Haneuljae’s Murder

as 尹河

The Suspicious Housekeeper

Kocowa Amazon Channel

The Suspicious Housekeeper

as Choi Soo Hyuk

After School: Lucky or Not

After School: Lucky or Not

as Unknown

Good Doctor

Good Doctor

as One of the punks who wants to beat Shi On

Home Alone

Home Alone

as Self

To the Beautiful You

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To the Beautiful You

as One of the guys putting ghost makeup on Song Jong Min's group

Law of the Jungle

Kocowa Amazon Channel

Law of the Jungle

as Unknown

Running Man

Running Man

as Unknown

KBS Drama Special

KBS Drama Special

as Unknown

Melon Music Awards

Melon Music Awards

as Messenger