Seo In Guk 서인국 is a Korean male singer and actor in South Korea. He was recruited by Jellyfish Entertainment in 2009 after winning the first edition of the TV show Superstar K. In 2012, Seo made his onscreen acting debut with a supporting role in KBS's "Love Rain", and made his acting breakthrough in "Reply 1997".

Seo was born in Ulsan and grew up in relative poverty; his mother worked as a recyclables collector and his father as a welder. Seo trained as a ssireum wrestler, learnt boxing and mixed martial arts in school and is a Hapkido 2nd dan. He decided to become a singer at the age of ten, after being inspired by the Korean rock musician Kim Jung Min. He performed at family gatherings and school events, and went on to study Applied Music at Daebul University, also auditioning at entertainment agencies. After repeatedly being rejected and told to lose weight, he struggled with bulimia for a time

In February 2017, it was announced that Seo received his official military enlistment date, set to take place on March 28th. However, Seo was diagnosed with Osteochondritis dissecans, a bone and cartilage condition, leading him to be subsequently declared at a Grade 5 health rating and became exempt from military duty as a result.


  • Name: Seo In Guk 서인국 / Seo In Gook
  • Birthday: October 23, 1987
  • Birthplace: Ulsan, South Korea
  • Education: Daebul University
  • Height: 180cm
  • Weight: 68kg
  • Star sign: Scorpio
  • Blood type: B
  • Occupation: singer, actor
  • Agency: Story J Company


TV Shows

  • Doom at Your Service (tvN, 2021)
  • Navillera (tvN, 2021) cameo
  • Abyss (tvN, 2019) cameo
  • The Smile Has Left Your Eyes (tvN, 2018)
  • Shopping King Louie (MBC, 2016)
  • Police Unit 38 (OCN, 2016)
  • Oh My Ghost (tvN, 2015) cameo
  • I Remember You (KBS2, 2015)
  • The King's Face (KBS2, 2014)
  • King of High School Life Conduct (tvN, 2014)
  • Another Parting (DRAMAcube, 2014)
  • Reply 1994 (tvN, 2013) cameo
  • Master's Sun (SBS, 2013)
  • Rascal Sons (MBC, 2012)
  • Reply 1997 (tvN, 2012)
  • Love Rain (KBS2, 2012)

TV Show Theme Songs

  • Star with Jung So Min - The Smile Has Left Your Eyes OST (2018)
  • Flower - Tomorrow with You OST (2017)
  • The Way to Come Back - High Schooler King of Life OST (2014)
  • No Matter What - Master's Sun OST (2013)
  • Our Love Like This with Jung Eun Ji - Reply 1997 OST (2012)
  • All For You with Jung Eun Ji - Reply 1997 OST (2012)
  • Destiny (Like a Fool) - Love Rain OST (2012)


  • I Love That Crazy Little Thing (2016)
  • No Breathing (2013)


  • Gwanghwamun Sonata (2012)


  • 2016 MBC Drama Awards:
    • Excellence Award - Miniseries - Actor (Shopping King Louie)
  • 2016 11th Asian TV Drama Conference:
    • Special Award, Actor (Police Unit 38)
  • 2016 tvN10 Awards:
    • Best Kiss with Jung Eun Ji (Reply 1997)
    • Made in tvN, Drama (Reply 1997)
  • 2014 KBS Drama Awards:
    • Newcomer Actor Award (The King's Face)
  • 2013 SBS Drama Awards:
    • New Star Award (Master's Sun)
  • 2012 14th Mnet Asian Music Awards:
    • Best OST with Jung Eun Ji (Reply 1997 OST - All for You)
  • 2012 1st K-Drama Star Awards:
    • Best Couple Award with Jung Eun Ji (Reply 1997)
    • Rising Star Award (Reply 1997)
  • 2012 Style Icon Awards:
    • Top 10 Style Icons (couple with Jung Eun Ji) for (Reply 1997)
  • 2012 5th Korea Drama Awards:
    • Best Couple Award with Jung Eun Ji (Reply 1997)
    • Best New Actor Award (Reply 1997)


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