Acting Prime Minister Winston Peters joins Stuff for a live interview at 8am to talk through his first week in the job while Jacinda Ardern takes maternity leave.

Peters has been acting prime minister before - but never for a full six weeks.

But he's also got the Foreign Affairs portfolio to worry about, and the party he created has slipped below 5 per cent in several polls.

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What will Simon Bridges and Winston Peters have to say?

Peters will discuss all of this and more in a live interview with Stuff political editor Tracy Watkins at 8am.

National leader Simon Bridges will join Stuff later on at 9.30.

 - Stuff