The Green Party has unexpectedly selected a candidate for the Ohariu seat, just two days after long-time MP Peter Dunne pulled out of the race.
Tane Woodley is stepping up as the Green Party candidate, after previously campaigning for the party vote in the area.
The move means Labour's Greg O'Connor will have a race on his hands.
A recent 1 NEWS Colmar Brunton poll had Labour's Greg O'Connor leading Ohariu electorate with 48 per cent of eligible voters picking the former Police Association head.
Peter Dunne sat at 34 per cent while National candidate Brett Hudson was on 14 per cent.
"Our decision won't have any material effect on the campaign that Labour is running," Green Party Co-convenor Debs Martin said.
Former army officer Mr Woodley said he has stood in the electorate before, and "the difference now is that I will have more opportunities to highlight the unique values that a Green
Party has to offer more directly to Ohariu voters".
Mr Dunne became the third party leader to step down in as many weeks, as shocks keep coming in the election campaign like no other.
Mr Dunne, a key government ally, announced he is not contesting his long-held Ohariu seat in Wellington, the decision a blow for National and one that could have major implications for the election result.