Winston Peters has pulled out of tonight's TVNZ debate, claiming there's no point in taking part because Labour and National won't be there.

Despite it being billed as the minor parties leaders debate, the New Zealand First leader says he was told all parties would be involved.

The Greens, the Maori Party and Act are all confirmed to appear, as is United Future's new leader Damian Light.

The Opportunities Party's Gareth Morgan failed in a legal bid to join the line-up on Thursday.

TVNZ political editor Corin Dann will moderate the debate as Mike Hosking is unwell.

Live from 7pm - CLICK HERE FOR LIVE AUDIO OF THE LEADERS DEBATE