Jacinda Ardern is off to Melbourne for a two-day trip where she'll be meeting with business leaders, delivering a speech, and congratulating Scott Morrison on his re-election.
The Prime Minister will first meet with Victoria [State] Governor Linda Dessau and Premier Daniel Andrews on Thursday. She will then attend an NZTE investor lunch business event.
Later on, Ardern will deliver the keynote speech 'Why Good Government Matters' at an Australia New Zealand School of Government (ANZSOG) event hosted by Melbourne Lord Mayor Sally Capp.
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Ardern will then meet with the Australian Prime Minister on Friday, which she said will be her first opportunity to congratulate Morrison "in person after his re-election victory".
Morrison, leader of Australia's Liberal Party, defeated his Labor Party opponent Bill Shorten in the country's federal elections in May - despite polls suggesting Shorten would win.
Ardern last met with Morrison in March when he attended the National Remembrance Service held at Christchurch's Hagley Park to remember the 51 victims of the mosque shootings.
Morrison told Ardern at the time how impressed he was with New Zealand's response to the March 15 attack, and "the way you responded to hate with love, and to violence with peace".
The pair met in January in Auckland, when Ardern raised with Morrison her concerns about Australia's immigration stance and its refusal to take New Zealand's offer to resettle 150 refugees from offshore detention centres.
On the topic of New Zealanders being deported from Australia - some of whom have no history with New Zealand - Ardern told Morrison at the time: "In my view, this has become corrosive to our relationship."
Australia's Foreign Minister Marise Payne confirmed in Auckland last week that Australia had "no intention" of reviewing legislation around the deportation of Kiwis even if they haven't set foot in New Zealand before.
New Zealand has pushed back since former Australian Prime Minister Tony Abbott changed the country's law in 2014 around the processes associated with visa cancellations on criminal grounds - which has affected Kiwis.
Last week, National leader Simon Bridges met with Morrison in Sydney where it's understood the pair discussed the Liberal Party's election victory.