US President Donald Trump will host Australian Prime Minister Malcolm Turnbull on Thursday to reaffirm ties after a rocky start earlier this year.
Mr Trump had reportedly labelled a February call between the two about a refugee deal as his "worst" that day.
The leaders' first meeting in person is expected to cover topics including security, trade and North Korea.
It is also to mark 75 years since the Battle of the Coral Sea in World War Two, key to ties between the nations.
"My meeting with President Trump will provide an opportunity to reaffirm our alliance and the United States' engagement with the Asia Pacific," Mr Turnbull said in a statement.
Russia, the US, Turkey, Iran and Syria are close to agreeing the establishment of "safe zones" in Syria aimed at ensuring the viability of a ceasefire, Vladimir Putin says.
The Russian president said they would amount to no-fly zones.
Mr Putin said his US counterpart Donald Trump had told him in a phone call on Tuesday that he supported the idea.
A final decision must be made at Syria talks currently taking place in the Kazakh capital Astana, Mr Putin said.
However, Syrian rebels say they have suspended participation in the Astana talks because of continuing air strikes.