South Korean pop star best known as a member of the boy band U-KISS. He has since tried his hand at acting, starring in the 2012 film Don't Cry Mommy.
He graduated from Hanrim Entertainment Arts School before being chosen by NH Media to be a member of U-KISS.
He has appeared as himself on numerous reality shows, including Idol Maknae Rebellion.
His father has owned a magazine. He married his wife in 2015. His son Asher was born in 2016.
He co-starred with fellow singer and actor Jay Park in the 2011 film Mr. Idol.