Denis Vincent Napthine (born 6 March 1952) is a former Australian politician who was the 47th Premier of Victoria. Napthine was a Liberal Party member of the Victorian Legislative Assembly, representing the electoral district of Portland from 1998 to 2002 and South-West Coast from 2002 to 2015. He was elected leader of the Parliamentary Liberal Party on 6 March 2013 following the resignation of Ted Baillieu and was sworn in as premier on the same day.