Sung Hoon was a swimming champion in his University and specialised in butterfly stroke. He swam for 14 years but had to quit because of a spinal injury. He then enlisted into the military, but the same injury sent him home early. Sung then went on and became a swimming trainer. He debuted as an actor in 2009 with White Brown's Because I Love You.
Career
Sung Hoon's breakthrough role was in the supernatural romance drama, New Tales of Gisaeng. His performance in this drama earned him a SBS Acting award for the Best New Actor in 2011. In 2012, he was cast in his first Chinese drama, The Bodyguard. The same year, he featured in historical drama Faith, playing an antagonist role. Later that year, he was cast in the daily drama, The Birth of a Family. In 2013, Sung starred as the lead role in the weekend drama, Passionate Love. In 2014, Sung starred in the web drama 6 Persons Room, where he played successful businessman who suffers an injury and finds himself in a hospital surrounded by strange patients. In 2015, he starred in the web drama Noble, My Love, and featured in KBS's romantic comedy seriesOh My Venus playing a professional MMA fighter. Sung is also a musical Disc jockey, and conducts DJ activities under the name ROI. Sung has performed in various countries such as China, Hong Kong, Thailand, Malaysia, Singapore and Indonesia. In 2016, Sung returned to the Korean small screen with KBS's weekend drama Five Enough, playing a model turned professional golfer, where his pairing with Shin Hye-sun gained popularity among the viewers. In 2017, Sung starred in the romantic comedy drama My Secret Romance, in which he played a second-generation chaebol. He then played an entertainment company producer in The Idolmaster KR, which is based on The Idolmaster Japanese video game. The same year, Sung was cast in the romance-fantasy film Are You in Love? opposite Kim So-eun. The film premiered in 2020. In 2018, Sung's debut action filmBrothers in Heaven was released in January. He acted alongside Jo Han-sun as fraternal twins. He was also cast in the second season of the sitcom, The Sound of Your Heart, as well as the romantic comedy webdrama I Picked Up a Celebrity on the Street. The same year, Sung guested on the variety showI Live Alone. In 2019, he returned to small screen with the romantic comedy drama Level Up playing a character of a company restructuring expert.
