The United National Party is a centre-right political party in Sri Lanka. The UNP has served as the country's ruling party, or as part of its governing coalition, for 38 of the country's 74 years of independence, including the periods 1947–1956, 1965–1970, 1977–1994, 2001–2004 and 2015–2019. The party also controlled the executive presidency from its formation in 1978 until 1994 and back in 2022.

Junius Richard Jayewardene, commonly abbreviated in Sri Lanka as J.R., was a Sri Lankan lawyer, Public official and a stateman who served as Prime Minister of Sri Lanka from 1977 to 1978 and as the second President of Sri Lanka from 1978 to 1989. He was a leader of the nationalist movement in Ceylon who served in a variety of cabinet positions in the decades following independence. A longtime member of the United National Party, he led it to a landslide victory in 1977 and served as prime minister for half a year before becoming the country's first executive president under an amended constitution.