 Hun Manet was born on 20 October 1977 in Koh Thmar Village, Memot District, Kampong Cham Province during the Khmer Rouge rule of Cambodia as the second son of Hun Sen and Bun Rany.On the night of his birth, a bright light flew over the roof of the house, of which Hun Sen believed his son was born from a supernatural being that is worshipped in Koh Thmar Village.He grew up and received his General Education in Phnom Penh and later joined the Royal Cambodian Armed Forces in 1995, the same year he entered the United States Military Academy at West Point.