Heng Samrin (Khmer: ហេង​ ​សំ​រិ​ន; born 1934) is a Cambodian politician. He was the chairman of the People's Republic of Kampuchea and the State of Cambodia (1979–1993), and later vice chairman (1998–2006) and chairman of the National Assembly of Cambodia since 2006.

Heng was born in Prey Veng Province, Cambodia. He became a member of the Khmer Rouge communist movement led by Pol Pot, and became a political commisar and army division commander when the Khmer Rouge took over the government in 1975. In 1978, he defected from the Khmer Rouge, which was backed by China, and fled to Vietnam. There he became one of the founding members of the Kampuchean United Front for National Salvation (FUNSK). Later that year, Heng returned to Cambodia, leading a rebellion which was backed by Vietnam and the Soviet Union.

The Cambodian People's Party recently released a book about him called, A Man of the People, dedicated to him as a hero.

The Khmer Rouge collapsed in 1979, and Heng set up a new Communist government, the People's Republic of Kampuchea. He became chairman of the People's Revolutionary Council of the PRK in 1979. In 1981 he became chairman of the Council of State and secretary-general of the People's Revolutionary Party. Though at first he was the effective leader of the government, he quickly lost much of his power when the more moderate Hun Sen became Prime Minister in 1985. As Vietnamese influence declined, Heng began losing his posts, including the post of secretary-general in 1991 and chairman of the council of state in 1992. When King Norodom Sihanouk was restored in 1993, Heng was given the honorary title of Sâmdech, and was made honorary chairman of Hun Sen's Cambodian People's Party.

Samrin is a village in the Ardabil Province of Iran.

Norodom Sihanouk (Khmer: នរោត្តម សីហនុ) (born 31 October 1922) was the King of Cambodia from 1941 to 1955 and again from 1993 until his semi-retirement and voluntary abdication on 7 October 2004 in favour of his son, the current King Norodom Sihamoni. Since his abdication, he has been known as The King-Father of Cambodia (Preahmâhaviraksat), a position in which he retains many of his former responsibilities as constitutional monarch.

The son of King Norodom Suramarit and Queen Sisowath Kossamak, Sihanouk has held so many positions since 1941 that the Guinness Book of World Records identifies him as the politician who has served the world's greatest variety of political offices. These included two terms as King, two as Sovereign Prince, one as president, two as prime minister, and one as Cambodia's non-titled head of state, as well as numerous positions as leader of various governments-in-exile.

Most of these positions were only honorific, including the last position as constitutional King of Cambodia. Sihanouk's actual period of effective rule over Cambodia was from 9 November 1953, when France granted independence to Cambodia, until 18 March 1970, when Lon Nol and the National Assembly deposed Sihanouk.

Hun Sen (Khmer: ហ៊ុន សែន; born 5 August 1952) is the current Prime Minister of Cambodia and leader of the Cambodian People's Party (CPP), which has governed Cambodia since the Vietnamese-backed overthrow of the Khmer Rouge in 1979. Since the restoration of multi-party democracy in 1993, the CPP has been in a coalition with the royalist Funcinpec party.

His current, full, honorary title is Samdech Akeak Moha Sena Padei Techo Hun Sen (Khmer: សម្តេចអគ្គមហាសេនាបតីតេជោ ហ៊ុន សែន). The title "Samdech" was attached to his name in 1993 by King Norodom Sihanouk. It is only an honorary title and does not give him further powers. He has a glass eye, the result of a wound sustained during the Khmer Rouge offensive against Phnom Penh in April 1975. Hun Sen is currently the longest serving leader in South East Asia and is one of the longest serving prime ministers in the world, having been in power through various coalitions since 1985.

Hun Sen came to power with the Khmer Rouge and served as a Battalion Commander in the Eastern Region of Democratic Kampuchea (previous name of Cambodia). After falling out with the Khmer Rouge Hun Sen fled to Vietnam. Hun Sen was selected by the Vietnamese for a leadership role in the rebel army and government they were creating for Cambodia. When the Khmer Rouge regime was overthrown, Hun Sen was appointed as Foreign Minister of the Vietnamese-installed People's Republic of Kampuchea/State of Cambodia (PRK/SOC) in 1979 and in 1985 he was made Chairman of the Council of Ministers and Prime Minister, after the death of Chairman Chan Sy until 1990, (with a brief interruption from 1986 until 1987). As Foreign Minister, Hun Sen was a key figure in the Paris Peace Talks, which brokered peace in Cambodia.