[2] Manet grew up and received his general education in Phnom Penh and later joined the armed forces in 1995, the same year, he entered the United States Military Academy at West Point.

Manet was born on 20 October 1977 in Koh Thmar village, Memot District, Kampong Cham Province, in the Khmer Rouge-ruled Democratic Kampuchea as the second son of Hun Sen and Bun Rany.

[8] Manet grew up and received his general education in Phnom Penh and later joined the Royal Cambodian Armed Forces (RCAF) in 1995, the same year he entered the United States Military Academy at West Point.

[21] Shortly after his rise to the prime ministership, Manet met with fringe global diplomats in order to bolster his credentials.

Manet met with Charles Yang from the South Korean organization Universal Peace Federation, founded by Sun Myung Moon, a controversial cult-like internationalist and convicted felon of tax evasion.

[19] Although having never publicly expressed interest in the role, he received strong support from several government ministers, party members as well as the CPP's influential Standing Committee.

Hun Manet stood as a first-ranked candidate in Phnom Penh for the National Assembly in the 2023 general election, a requirement to be appointed prime minister.

[26][27][28][29] On 7 August, King Norodom Sihamoni issued a royal decree officially nominating Manet as the new prime minister.

He invited Manet to form a new government for the seventh mandate, subject to a vote of confidence from the National Assembly on 22 August.

[34] On 5 August 2024, his administration launched the controversial Funan Techo Canal Project which would link the Mekong River to Cambodia's coast, significantly reducing the country's reliance on Vietnamese ports.