Seo In-guk (서인국) is a South Korean singer and actor. He launched his singing career after winning the talent reality show Superstar K in 2009, and made his acting breakthrough in tvN's Reply 1997.
Known For

Twelve
Won-seung · (8 episodes)
2025

Better Late Than Single
Self - Cupid Expert · (10 episodes)
2025

Jungle BoB
(8 episodes)
2024

Death's Game
Choi Yee-jae · (8 episodes)
2023

The Boys
Lee Jae-seok
2023

Nattering with Nah
Self · (1 episode)
2023

TRAP by SEO IN GUK
2023

The Seasons
Self · (1 episode)
2023

Project Wolf Hunting
Park Jong-du
2022

Look, My Shoulder's Dislocated
Self · (2 episodes)
2022

Café Minamdang
Nam Han-jun · (18 episodes)
2022

Soundtrack #1
Jay Jun · (1 episode)
2022

Pipeline
Pindol / Kang Sae-dol / Drill-bit
2021

Doom at Your Service
Myul Mang / Kim Sa-ram · (16 episodes)
2021

Navillera
Hwang Hee · (1 episode)
2021

Abyss
Grim Reaper · (1 episode)
2019

The Smile Has Left Your Eyes
Kim Moo-Young · (16 episodes)
2018

I Love That Crazy Little Thing
Yang Ming-zhe
2016

Shopaholic Louis
Louie · (16 episodes)
2016

Squad 38
Yang Jung-do · (16 episodes)
2016

She Was Pretty
Himself · (1 episode)
2015

Oh My Ghost
Edward · (1 episode)
2015

I Remember You
Lee Hyun · (16 episodes)
2015

The King's Face
Prince Gwanghae · (24 episodes)
2014

High School King of Savvy
Lee Min-seok / Lee Hyung-seok · (17 episodes)
2014

Another Parting
Ahn Young Mo · (5 episodes)
2014

SBS: The Master's Sun - Making
Himself
2013

No Breathing
Jo Won-il
2013
Boy
Mad Hatter

Reply 1994
Yoon Yoon-jae · (3 episodes)
2013

Master's Sun
Kang-woo · (17 episodes)
2013

Home Alone
Self · (14 episodes)
2013

아들 녀석들
Yoo Seung-Gi · (50 episodes)
2012

Reply 1997
Yoon Yoon-jae · (16 episodes)
2012

Baeksang Arts Awards
Self · (1 episode)
2012

Love Rain
Kim Chang-mo & Kim Jeon-seol · (20 episodes)
2012

Law of the Jungle
(10 episodes)
2011
Smoking Gun
Kim Do Young · (1 episode)
In Your Brilliant Season
Sunwoo Chan · (1 episode)

SNL Korea
Self · (1 episode)
2011

Superstar K
Self - Participant · (12 episodes)
2009

You Hee-yeol's Sketchbook
Self · (5 episodes)
2009

Jikpil
Kwon Soo-young · (1 episode)

KBS Entertainment Awards
Host · (1 episode)
2002

KBS Drama Awards
Host · (1 episode)
1987
Boyfriend on Demand
Park Kyeong-nam · (1 episode)
내일도 출근!
Kang Si-hoo · (1 episode)

Running Man
(1 episode)
2010