Samdech Hun Sen (/hʊn sɛn/; Khmer: ហ៊ុន សែន, UNGEGN: Hŭn Sên [hun saen]; born 5 August 1952) is a Cambodian politician and former military officer who currently serves as the president of the Senate. He previously served as the prime minister of Cambodia from 1985 to 1993 and from 1998 to 2023. Hun Sen is the longest-serving head of government in Cambodia's history. He is the president of the Cambodian People's Party (CPP), which has governed Cambodia since 1979, and has served as a member of the Senate since 2024. His full honorary title is Samdech Akka Moha Sena Padei Techo Hun Sen (Khmer: សម្តេច អគ្គមហាសេនាបតី តេជោ ហ៊ុន សែន [sɑmɗac ʔakkeaʔ mɔhaː senaː paɗəj tecoː hun saen]; meaning "Lord Prime Minister and Supreme Military Commander Hun Sen").