Nuon Chea (; 7 July 1926 – 4 August 2019 also known as Long Bunruot (), was a Cambodian former communist politician. Nuon Chea was the oldest living former Prime Minister (serving for a month) and the oldest of the last surviving Khmer Rouge leaders. He was the chief ideologist of the Khmer Rouge Regime and second in command of bloody Khmer Rouge regime he presided over. He received a life sentence for his crimes against humanity, alongside another top-tier Khmer Rouge leader, Khieu Samphan. Further trial convicted him of the crimes of genocide in November 2018.