He is perhaps best known for his role as Mike Juhn in the 2007 crime film West 32nd (2007), directed by Michael Kang.
[1][2] Jun-seong Kim grew up in Hong Kong, and has spent time in the United States; he is fluent in English, Korean, Mandarin and Cantonese.
He majored in Philosophy and Economics while at Wake Forest University in North Carolina, and worked as a stockbroker before becoming an actor.
[3] An early experience that turned him on to a career in acting was performing in the musical The Rocky Horror Show in Korea in 2001.
He has also appeared in a number of Korean movies and television series, among them Late Autumn (2010), The Scam (2009), Love Exposure (2007), and Lobbyist (2007).