Nickolai Evtimov Mladenov (Bulgarian: ??????? ??????? ????????; born 5 May 1972) is a Bulgarian politician and diplomat who served as the minister of foreign affairs in the government of then prime minister Boyko Borisov from 2010 to 2013.
He was a Member of the European Parliament from 2007 to 2009 and was Minister of Defense from 27 July 2009 to 27 January 2010.
On 2 August 2013 Mladenov was appointed as United Nations Secretary-General Ban Ki-moon's Special Representative for Iraq and Head of the United Nations Assistance Mission for Iraq.
On 5 February 2015, Mladenov was appointed UN Special Coordinator for the Middle East Peace Process.