Kim Hye-sung (; also spelt Kim Hye-seong; born January 14, 1988) is a South Korean actor and model.
Kim is a South Korean actor under Namoo Actors. In March 2012, Kim Hye-sung enlisted for his mandatory military service at the 306 Reserve in Uijeongbu, Gyeonggi Province and was discharged in March 2013. He is popular and well known for his leading role as Juno in Jenny, Juno (2006).