Marthinus Christoffel Johannes van Schalkwyk (born 10 November 1959) is a South African politician, academic, lawyer, and apartheid-era intelligence operative, who serves as High Commissioner to Australia. He previously served as MP and Minister of Tourism in the Cabinet of South Africa. Formerly Premier of the Western Cape and Leader of the Opposition in the Parliament of South Africa, he was the leader of the New National Party from its inception on 8 September 1997 until its dissolution on 9 April 2005. He was appointed Minister of Environmental Affairs and Tourism in the Thabo Mbeki administration after merging his party with the ruling African National Congress (ANC), despite the poor performance of the former in the 2004 General Election.