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Seo Ji-hoon

Cast & creator

Seo Ji-hoon

1997-04-25 (age 29) Daegu, South KoreaIMDb

Best known for Running Man, KBS Drama Special, Signal

Seo Ji-hoon is a South Korean actor under Management Koo. He debuted in the hit drama “Signal” as the villainous Jang Tae Jin. He later landed his first lead roles in “Matching Boys Archery” as the puppy-like Yoo Ji Wan. He enlisted in the military on February 3, 2026

Also known as: Seo Ji-Hun, 徐智勋, Seo Ji Hoon, Seo Ji Hun

Movies

2

film credits

Series

29

television credits

Career

31

2010–2025 · acting roles

Credit score

6.5

average across scored titles

Signature credits

Known for

Ordered by popularity

Running Man

Running Man

Acting · 2010

KBS Drama Special

KBS Drama Special

Jo Tae Woong · 2010

Signal

Signal

Jang Tae-jin · 2016

Drama Stage

Drama Stage

Kim Young Hoon · 2017

Revenge of Others

Revenge of Others

Seok Jae-beom · 2022

Across film & television

Filmography (31)

Search filmography

Showing 31 of 31 credits

Running Man

Running Man

KBS Drama Special

KBS Drama Special

Jo Tae Woong

Signal

Signal

Jang Tae-jin

Drama Stage

Drama Stage

Kim Young Hoon

Revenge of Others

Revenge of Others

Seok Jae-beom

Prison Playbook

Prison Playbook

Min Shik [Ji Ho’s friend]

My Lovely Liar

My Lovely Liar

Lee Kang-min

Imitation

Imitation

Yoon Bin

Meow, the Secret Boy

Meow, the Secret Boy

Lee Jae-seon

School 2017

School 2017

Yoon Kyung-woo

Misty

Misty

Ha Myung Woo [Young]

Blue Dragon Series Awards

Blue Dragon Series Awards

Self

Flower Crew: Joseon Marriage Agency

Flower Crew: Joseon Marriage Agency

Lee Soo

Payback: Money and Power

Payback: Money and Power

Developer Cha [Blue Net Developer]

Touch

Touch

[Girl on the plane's boyfriend]

My Youth

My Youth

Kim Seok-ju

To All The Guys Who Loved Me

To All The Guys Who Loved Me

Park Do-Gyeom

Tarot

Tarot

Woo Jae Yoon [One Person Storage]

The Battleship Island

The Battleship Island

Joseon Draftee

The Midnight Studio

The Midnight Studio

Yoon So Myeong

Solomon's Perjury

Solomon's Perjury

Bae Joon-Young

Mama Fairy and the Woodcutter

Mama Fairy and the Woodcutter

Kim Geum

My First Love

My First Love

Young Kang Shin-Woo

Seasons of Blossom

Seasons of Blossom

Lee Ha-min

BEGINS ≠ YOUTH

BEGINS ≠ YOUTH

Kim Hwan

Matching! Boys Archery

Matching! Boys Archery

Yoo Ji Wan

The Destiny Changer

The Destiny Changer

Geum Tae-yeong

A Special Meal of the Weirdo 'Nara'

A Special Meal of the Weirdo 'Nara'

Go Shi Saeng

Mepsi Meow

Mepsi Meow

Yeon Woo

The Legendary Lackey

The Legendary Lackey

Jo Tae-woong

On/Off

On/Off

Jang Jun Chul