First Name: Nichkhun
Family Name: Horvejkul
Native name: นิชคุณ หรเวชกุล
Also Known as: 닉쿤; Buck; คุณ; Khun; Nichkhun Buck Horvejkul; Nitchakhun Horawetchakun;
Nationality: Thai
Gender: Male
Born: June 24, 1988

Nichkhun Buck Horvejkul, usually known as Nichkhun, is a Thai American singer and actor active in South Korea. He sings and raps as a member of 2PM, a six-member South Korean boy band. 2PM’s Nichkhun is one of the most successful foreign celebrities in Korea. After 2PM's debut in 2008, Nichkhun began doing Thai endorsements and was selected by the Tourism Authority of Thailand. It was announced on April 3, 2014, that Nichkhun was in a relationship with Girls' Generation member Tiffany. They broke up after dating for 1 year and 5 months. He is also the older brother of Thai actress Horvejkul Nutcharee.