Kim Jeong Hoon, born in Jinju, South Korea, is a South Korean singer and actor. He initially rose to fame as a member of Korean duo UN debuting with the single Voice Mail in 2000. After the duo disbanded in 2005, his fame increased as an actor starring in Goong, a drama based on comic book of the same name.

He originally wanted to be a laboratory researcher and did not realize that he would become an actor and singer. By 2005, he had already begun starring in Korean dramas, such as sitcom Orange and A Man and a Woman in 2004. He had said his final dream is to become a renowned movie director.

He previously attended Seoul National University (College of Dentistry) until he dropped out to focus on his acting career. He was a senior at Chung-Ang University, where he majored in acting.

On April 28, 2009, he left the public for mandatory military service of two years. 80000 of Kim Jeong Hoon's fans from Japan, Korea, Turkey and China gathered to see him off to serve the country.

He is known in New Zealand for having a resemblance to Dennis Kwan, a Chinese New Zealand R&B singer and dancer who rose to fame through a youtube video performing a cover of Korean hit single Wedding Dress by R&B artist Taeyang.
(Source: Wikipedia) Edit Biography