US Vice-President Mike Pence will hold talks with Prime Minister Malcolm Turnbull today, with growing military tensions on the Korean peninsula expected to dominate his three-day visit to Australia.
Mr Pence flew into Sydney late yesterday accompanied by his wife and children, on the final stopover of his tour of key US allies in Asia.
He is expected to use today's talks to reassure Australia of America's commitment to the region when he today holds talks with the Turnbull Government.
He will also meet Opposition Leader Bill Shorten, and host a gathering of American business leaders.
On Sunday Mr Pence and his family will have the opportunity to explore key Sydney landmarks, during a tour of the Harbour.
Pence visit, Anzac Day have police on high alert
New South Wales police have tightened security in and around Sydney for the visit of the US Vice President and for Tuesday's Anzac Day commemorations.
NSW Police Assistant Commissioner Mark Murdoch said police were working very closely with the US Secret Service during the visit.
"The US Secret Service take all overseas visits by their heads of state very, very seriously. So we are used to in NSW working very closely with the Secret Service to facilitate a safe visit by their parliamentary leaders," he said.
Mr Murdoch said there would be clearways in and around the Sydney CBD, Kirribilli, and Mosman from today until Monday, and he warned drivers there may be traffic disruptions caused by road closures.
"Those road closures will be put in place before the motorcade hits a particular area. As soon as the motorcade passes the road will be re-opened," he said.
"Safety is paramount for all road users. There will be some inconvenience and we apologise for that but again we just ask people to be patient, we will try and get the motorcades through as quickly as we can and as safely as we can."
Tens of thousands of people are due to attend Tuesday's Anzac Day parade, seen as a potential target for terrorism.