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Biography
Ko A-sung (born 10 August 1992) is a South Korean actress. She began her career as a child actress, notably in 2006 top-grossing blockbuster The Host. This was followed by major roles in Snowpiercer (2013), Thread of Lies (2014) and Office (2015), as well as the TV dramas Master of Study (2010) and Heard It Through the Grapevine (2015).
Filmography17 titles

A Melody to Remember
2016as Park Joo-mi
2016as Park Joo-mi

Running Man
2010
2010

Midnight Diner: Tokyo Stories
2016as Yoona
2016as Yoona

Heard It Through the Grapevine
as Seo Bom
as Seo Bom

Doona!
2023as Ha-yeon
2023as Ha-yeon

Samjin Company English Class
2020as Lee Ja-young
2020as Lee Ja-young

The Beauty Inside
2015as Woo-jin 101
2015as Woo-jin 101

Amazing Saturday
as Self
as Self

Thread of Lies
2014as Lee Man-ji
2014as Lee Man-ji

The King
2017as Miss Kim
2017as Miss Kim

A Brand New Life
2009as Ye-shin
2009as Ye-shin

Pavane
2026as Mi-jung
2026as Mi-jung

Right Now, Wrong Then
2015as Yeom Bora
2015as Yeom Bora

The Host
2006as Park Hyun-seo
2006as Park Hyun-seo

Snowpiercer
2013as Yona
2013as Yona

Tracer
as Seo Hey-young
as Seo Hey-young

Office
2015as Lee Mi-rye
2015as Lee Mi-rye