Ardern ruled out a shift to appease Winston Peters.
The National leader found "another level" while campaigning, Patrick Gower writes.
Follow along with Newshub's live updates from the day after the tightest election in decades.
Entertainment reporter Sarah Templeton felt under-prepared to report from NZ First's election night party - then Winston Peters made a beeline for her.
Our poll was the most accurate, writes Patrick Gower.
ACT received just 0.5 percent of party votes, but held onto the Epsom electorate.
"There are two immediate winners in this circle of mess - uncertainty and Winston."
In the biggest upset of the election,Tamati Coffey beat the Maori Party's Te Ururoa Flavell.
ACT Party leader David Seymour has held his seat, but will he be in Opposition?
Mr Peters reflected on Te Ururoa Flavell's time in Parliament.
As predicted, New Zealand First's Winston Peters holds the balance of power.
The former Greens co-leader told The Hui she intends to stick around.
The Green Party is back in Parliament but has lost MPs... is that a good result?
Lisa Owen talks to National's campaign manager Steven Joyce about what happens next.
At 23 years old, she's the youngest MP since Marilyn Waring in 1975.
"A block of 13 MPs in one Parliament, Māori MPs, in one party, is a historic occasion," he told The Hui.
The Māori Party co-leader says she's worked harder than any "waste of space" Labour MP.
The Electoral Commission says 78.8 percent of those eligible voted - up from 77.9 percent in 2014.
Entering the mine is a bottom line for Winston Peters, who is likely to decide the next Government.
Nick Smith has held on to his Nelson seat comfortably, despite claims his support was sliding.
ACT won't get any more MPs, but its leader remains the representative for Auckland's Epsom electorate.
She said National and Bill English had numbers they "should be celebrating".
Greens leader James Shaw has defiantly claimed he is happy with Saturday's election result.
But they've lost their long-held seat of Hutt South.
Former Police Association boss Greg O'Connor has a small but solid lead in Ōhāriu.
The National leader wants a new Government formed quickly.
Follow along here for the biggest breaking news as it happens.
The NZ First leader was too far behind to catch National's Matt King.
The TOP leader claimed property owners are ripping off the country's youth.
Nikki Kaye had a good lead on the votes, with 10 percent still to go.
The central Auckland electorate was considered a key bellwether seat.
The Foreign Affairs Minister nearly doubled his nearest rival in the Christchurch seat.
What are the NZ First leader's 'bottom lines' and will this be his final election?
Both the Greens and National have been caught out, but only one party's billboards are technically illegal.
Newshub looks at the different scenarios which could arise from the election.
These seats could make or break parties' chances in the elections.
With nearly 200 people working across 17 live locations, we have the whole country covered.
There's now less than an hour to go before polling in the 2017 General Election closes.
Hundreds of thousands of Kiwis will flock to the polling booths today.