Kim Jong-kook
Jang began dating his girlfriend, Kim Yeo-jin, in 2002. They met at a fitness club, where Kim was his Pilates instructor. The couple's marriage was registered in January 2008, and the ceremony was held in June. His close friends, singer Kim Jong-kook and actor Cha Tae-hyun, participated in the wedding ceremony. The couple have two sons and a daughter, born in February 2008, November 2009 and April 2015 respectively.