Ko A-sung

Go Ah-sung (; born August 10, 1992) is a South Korean actress. She began her career as a child actress, notably in The Host. Her other notable works include Snowpiercer (2013), Thread of Lies (2014), A Resistance (2019), Samjin Company English Class (2020), as well as the television series Master of Study (2010), Heard It Through the Grapevine (2015), and Life on Mars (2018).

Career Go Ah-sung was four years old when she appeared in her first commercial; when she was ten, she joined the 2002 stage musical Peter Pan. At thirteen, Go officially began her acting career in the KBS children's program Oolla Boolla Blue-jjang (2004).

Having worked together in the MBC omnibus drama Beating Heart (2005), actress Bae Doona recommended Go to director Bong Joon-ho when he was casting for his much-anticipated monster film. After an extensive audition process, Go made her film debut in 2006 with a starring role in The Host. Bong praised her work, saying that she "showed really mature acting for her age, and that's one of her defining charms as an actress." Go was also applauded by film critics, with Stephen Hunter of The Washington Post complimenting her "exquisite performance," and Megan Ratner of the Bright Lights Film Journal noting her "unforced naturalness, reminiscent not only of Ana Torrent but of Zazie'''s Catherine Demongeot." Go received several acting nominations, and won Best New Actress at the 2006 Blue Dragon Film Awards. Radio Dayz (2008), and A Brand New Life (2009). In 2010, Go appeared in the high school series Master of Study, a Korean drama adaptation of the Japanese manga Dragon Zakura. It scored the highest ratings in its timeslot during its run.

Go starred in her first leading role in Duet (2012), an indie romance about an aspiring Korean singer on a tour of England and the British guy she meets who shares her interests in music, photography and travel.

In 2013, she reunited with The Host costar Song Kang-ho in the blockbuster sci-fi thriller Snowpiercer, Bong Joon-ho's first English-language film. Go next appeared opposite Kim Hee-ae in Thread of Lies (2014), a film adaptation of Kim Ryeo-ryeong's novel Elegant Lies about a willful girl seeking the truth behind her sister's suicide.

Go signed with an American agency, Untitled Entertainment in 2014. She returned to television in 2015 with Heard It Through the Grapevine, a black comedy about the chaos an unplanned teenage pregnancy causes in a wealthy, powerful family. Go then headlined the mystery thriller Office, which made its world premiere in the Midnight Screenings section at Cannes; she won Best Actress at Fancine for her role as an intern who becomes a person of interest in a murder investigation. She then starred in war drama A Melody to Remember. The film won the audience award at the 18th Far East Film Festival.

In 2017, Go challenges her first romantic comedy in the MBC's drama Radiant Office, as a twentysomething woman who, after a suicide attempt and possible terminally-ill diagnosis, thinks she has nothing to lose and tackles her job and life with new perspectives.

In 2018, Go was cast in the South Korean adaptation of the U.K series Life on Mars, as the sole female detective of the team. In 2019, Go returned to the big screen with historical film A Resistance.

Go led the 2020 critically-acclaimed and box office success dramedy film Samjin Company English Class, the winner of Best Film at the 57th Baeksang Arts Awards. She acted as an employee who mastered daily office works but accidentally discovered the company's water pollution.

In 2022, Go returned to TV series with the role of a tax investigator in the MBC and Wavve's financial thriller Tracer.

On February 3, 2026, Go parted ways with her agency, Artist Company. On May 7, Go made her theatrical Debut with the play, 'Uncle Vanya' held at LG Arts Center.

Other activities Go enjoys traveling alone and taking pictures. She became interested in photography through friend and frequent costar Bae Doona. Go's photographs were exhibited at the 5th annual Seoul Open Art Fair in 2010, alongside artwork by Ha Jung-woo and photos by Uhm Tae-woong.

Another of her interests is music. She did her own singing for the film Duet'', and has performed live on stage at Mudaeruk in Hongdae.

Go majored in Psychology at Sungkyunkwan University.

Filmography Film

Television series Year Title Role Notes 2004 Oolla Boolla Blue-jjang Noh Da-ji (Princess Blue Stone) 2005 Sad Love Story young Cha Hwa-jung Beating Heart Kim Bo-mi 2010 Master of Study Gil Pul-ip 2015 Heard It Through the Grapevine Seo Bom 2016 Midnight Diner: Tokyo Stories Rei / Yoona 2017 Radiant Office Eun Ho-won 2018 Life on Mars Yoon Na-young 2021 Crime Puzzle Yoo-hee 2022 Tracer Seo Hye-young 2023 Doona! Im Ha-yeon Cameo (episode 1–2, 6–8) 2024 Good Partner Lee Han-na Cameo (episode 16)

Television shows Year Title Role 2020 K-Ocean Pathfinders Cast member 2025 Edward Lee's Country Cook Cast member

Stage Theater +Theater performanceYearTitleRoleTheaterDate English Korean 2026 Uncle Vanya 바냐 삼촌 Sonya LG Signature Hall, LG Arts Center May 7-31 2015

Accolades Awards and nominations + Name of the award ceremony, year presented, category, nominee of the award, and the result of the nomination Award ceremony Year Category Nominee / Work Result APAN Star Awards 2015 Excellence Award, Actress in a Serial Drama Heard It Through the Grapevine 2018 Excellence Award, Actress in a Miniseries Life on Mars Baeksang Arts Awards 2007 Best New Actress – Film The Host 2010 Best New Actress – Television Master of Study 2014 Best Supporting Actress – Film Snowpiercer 2015 Best New Actress – Television Heard It Through the Grapevine 2019 Best Actress – Film A Resistance 2021 Samjin Company English Class 2026 Pavane Blue Dragon Film Awards 2006 Best New Actress The Host 2013 Best Supporting Actress Snowpiercer 2019 Best Leading Actress A Resistance 2024Because I Hate Korea Buil Film Awards 2021 Best Actress Samjin Company English Class Chunsa Film Art Awards 2021 Director's Cut Awards 2006 The Host Fantastic Film Festival of the University of Málaga 2015 Office 2016 Popularity Award, Actress Grand Bell Awards 2007 Best Supporting Actress The Host 2013 Snowpiercer Jeonju International Film Festival 2014 Moët Rising Star Award Go Ah-sung KBS Drama Awards 2010 Best New Actress Master of Study Korean Film Awards 2006 Best Supporting Actress The Host Korea Film Actors Association Awards 2016 Popularity Award A Melody to Remember Korea Movie Star Awards 2007 Best Young Star The Host MBC Birth of a Star 1995 King of Kings Go Ah-sung MBC Drama Awards 2017 Top Excellence Award, Actress in a Miniseries Radiant Office 2022 Excellence Award, Actress in a Miniseries Tracer Saturn Awards 2007 Best Performance by a Younger Actor The Host SBS Drama Awards 2015 Excellence Award, Actress in a Drama Special Heard It Through the Grapevine New Star Award The Seoul Awards 2018 Best Supporting Actress Life on Mars

Listicles + Name of publisher, year listed, name of listicle, and placement Publisher Year Listicle Placement Korean Film Council 2021 Korean Actors 200