Denis Vincent Napthine is a former Australian politician and veterinarian who served as the 47th premier of Victoria from 2013 to 2014. He held office as the leader of the Victorian division of the Liberal Party of Australia (LPA) and was a member of the Victorian Legislative Assembly (MLA) for the district of Portland from 1988 to 2002, before transferring to that of South-West Coast from 2002 to 2015.

The Victorian Liberal Party, officially known as the Liberal Party of Australia (Victorian Division) and branded as Liberal Victoria, is the state division of the Liberal Party of Australia in Victoria. It was formed in 1944. It became the Liberal and Country Party (LCP) in 1949, and simplified its name to the Liberal Party in 1965. The party sits on the centre-right to right-wing of the Australian political spectrum.