Labour and the Greens will deliver their combined State of the Nation address today.
Leaders from both parties will gather at the Mount Albert War Memorial Hall in Auckland about 2pm on Sunday.
Labour leader Andrew Little says it's about showing voters an alternative to the Government.
"This is about now laying out the choices the voters will have between a government that says 'We can’t do any more' and parties that say 'There has to be more, and we can do it."
Andrew Little says today's address will focus on ways to improve housing, jobs, education and health outcomes.
The event will be hosted by comedian Guy Williams, who posted the following video from his Twitter account.
A rival campaign event, socialist Joe Carolan's The Nation's in a State, will be taking place at Rocket Park at 12:30pm.