Ms Ardern, 37, seems to have reinvigorated Labour's base and has armed her party with the best chance of winning the general election on September 23.
Under her leadership, the centre-left party pulled ahead of the conservative New Zealand National Party in opinion polls for the first time in 12 years.
Since she was chosen as party leader, National Party's Bill English seems to finally have his work cut out for him with the latest Newshub poll putting the prime minister only 0.2 per cent ahead of his rival as preferred New Zealand leader.
Mr English became prime minister after his popular predecessor, John Key, stood down in December last year.
The 55-year-old has experience on his side, and was first elected to parliament in 1990 before working his way up through the political ranks to become finance minister from 2008 to 2016.
He is miles ahead of Ms Ardern in political office experience - who was elected to parliament in 2008 after joining the Labour Party when she was just 17.
