Mitchell Peter Fifield is an Australian politician and diplomat who last served as the Permanent Representative of Australia to the United Nations. He previously served as a Senator for Victoria from 2004 to 2019, representing the Liberal Party. He was a government minister in the Abbott, Turnbull, and Morrison governments, serving as Assistant Minister for Social Services (2013–2015), Manager of Government Business in the Senate (2013–2015), Minister for Communications (2015–2019), and Minister for the Arts (2015–2019).