Tony Abbott vowed Australia's "unflinching" support for the fight against Islamic State as he backed an ambitious United Nations plan to stamp out the terrorist threat posed by foreign fighters.
Mr Abbott became the first Australian prime minister to address the UN Security Council as a sitting member as part of an historic high-powered special session convened and chaired by US President Barack Obama.
It was only the sixth time in the UNSC's almost-70-year history that it has met at leader level, and only the second time a US president has chaired a meeting.
The meeting began with all 15 permanent and temporary UNSC members unanimously backing a US-drafted resolution aimed at stopping the travel and funding of IS fighters. The legally binding resolution imposes conditions on all 193 UN member states.
Mr Obama said the resolution reflected the world's will to degrade and destroy IS, also known as ISIL and ISIS.