Australia beat Argentina to reach Rugby World Cup final

Australia's Adam Ashley-Cooper celebrates one of his two tries. Credit: Reuters

Australia will face neighbours New Zealand in the Rugby World Cup final after a hat-trick from Adam Ashley-Cooper saw them past Argentina at Twickenham.

The match remained tight until Ashley-Cooper's third try gave the Wallabies room to breathe in the final moments, with the game finishing 15-29.

It means rivals Australia and New Zealand will play each other in a final for the first time since the Rugby World Cup began.

Argentina had become popular underdogs in the tournament after a run which saw them overcome Ireland in the quarter final.