Jo Hyun-jae (born May 9, 1980) is a South Korean actor. Jo made his entertainment debut as a singer in the four-member K-pop boy band Guardian, which disbanded after releasing their self-titled album in 1998. In 2000, after he drew popularity when he appeared in a commercial for sports drink Pocari Sweat, Jo began acting. He is best known for his leading roles in Love Letter (2003), Only You (2005), Ballad of Seodong (2005), and 49 Days (2011).