Whip and deputy whip roles have also been announced.
Winston Peters, Ron Mark, Shane Jones and Tracey Martin are likely ministers.
Even 1NEWS' political team had no idea when, how, and if the NZ First leader would reveal his coalition partners yesterday.
They will be joined inside Cabinet by four NZ First MPs.
The PM-elect also implied she would be involved in arts and culture, and intelligence portfolios.
The PM-elect was quick to get down to business, however.
That will include at least four Cabinet positions for NZ First with the Green Party's James Shaw also in line.
The new Labour leader caps a meteoric rise to power.
"We all know the rules, we play by them," Mr English said of his party's 56 seats in opposition.
Relive an action packed day, as Jacinda Ardern became New Zealand's new Prime Minister elect.
Winston Peters ends National's nine year reign as Government in sensational fashion.
Despite losing the top job, Mr English was happy to offer his replacement some advice.
The NZ First leader strongly hinted Labour had conceded the deputy PM job to him.
The NZ First leader has no doubt Jacinda Adern has enough experience to be PM.
After nearly two weeks of negotiations, Mr Peters announced his decision today.
It's believed the NZ First leader wants five ministerial portfolios, four inside cabinet, and that's a sticking point for National.
It's Bill's "satisfied" remarks versus Jacinda's wink.
Peters says he is meeting with his caucus to go over the "latest information" this afternoon.
Ruth Sutherland, 84, died in the fall on Tuesday.
1NEWS' political team unpack Winston Peters’ negotiation uncertainty.
NZ First said in a statement yesterday it would announce its decision this afternoon.
Dann said it was "very, very unclear" how tomorrow would play out.
Winston Peters will reveal his decision tomorrow.
Mr Peters has spoken with both Bill English and Jacinda Ardern.
Bowen House is a reluctant journo hang-out.
He believes the process may drag out for a day or two yet.
The pair had a get-together in Wellington tonight.
Winston Peters said NZ First had made lots of progress on policy, but needs to speak with Labour and National again.
The NZ First leader says his party are "98 per cent there" on the policy issues.
The NZ First MP battled with the automatic door before retiring for the evening.
