The 45-year-old,who previously served as COVID-19 and education minister,replacedJacinda Ardern after her shock resignation in January.
Polls have predicted voters may flip to a National-led government,driven by battleground issues like inflation,the cost of living,crime and housing.
Opposition Leader Chris Luxon is cutting a confident figure.
However,both major parties will likely need the support of at least one other minor party to form a majority.
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How to vote in the NZ election in Australia
While tens of thousands of trans-Tasman citizens in Australia will face the dual NZ election-Voice polling day,they have a two-week window to cast their Kiwi ballots early,in person or online.
Those eligible to vote in the election from overseas must be at least 18 years old,have lived in New Zealand for more than 12 months continuously at some point in their life.
Overseas voters must also qualify either as a New Zealand citizen who has been in Australia within the past six years,or a permanent resident who has been in the country within the last four years. Enrolling from overseas is not compulsory.
In Sydney,voters can cast their ballot at the New Zealand Consulate-General or the NSW Electoral Commission,and in Melbourne at the Victorian Electoral Commission. There are also polling stations in Canberra,Brisbane,Perth,Adelaide,Darwin and Hobart,according tovote.nz site.
National Party leader Chris Luxon.Credit:Getty
However,the New Zealand Electoral Commission is encouraging all overseas voters to download their ballots and statutory declaration forms and resubmit them online.
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All downloaded ballots will need to be witnessed and signed by an eligible person before being scanned or photographed and uploaded online. Only those living overseas can upload their vote online.
Ballots are due at 7pm New Zealand time on election day,October 14,which will be 5pm in Sydney and Melbourne.
About 63,000 overseas votes were cast among a total 2.9 million ballots at the last election.
with AAP