Julie Anne Genter has been selected as the Green Party's candidate to battle it out with Labour in the Mt Albert by-election.
The election was called after former Labour leader David Shearer left Parliament to head the United Nations mission in South Sudan.
Jacinda Ardern was the only person nominated for Labour.
Ms Genter says it won't be the normal war between two parties.
"I think it's going to be a real opportunity to do politics differently - to show that it doesn't have to be an antagonistic war, but actually politics is about all of us working together collaboratively and debating different policy points in a respectful way."
Ms Genter says no matter who wins, it will still be a step towards a fairer Government.
"I think no matter who wins, people in Mt Albert are going to get a competent MP who is committed to changing the government and taking New Zealand in a fair direction.
"It is great they are going to have an opportunity to choose depending on where they think the emphasis should be."
National chose not to stand a candidate in the Mt Albert by-election on the February 25.