<prompt> Who is the current Secretary General of the UN?Ban Ki-moonKofi A AnnanBoutros Boutros GhaliBoutros Boutros Ghali U Thant  <response>: Ban Ki-moon is the eighth Secretary-General of the United Nations. Mr Ban took office on 1 January 2007. On 21 June 2011, he was unanimously re-elected by the General Assembly and will continue to serve until 31 December 2016. Ref: 