Former Labour chief David Cunliffe has withdrawn from the party's leadership race, and has backed Andrew Little to take the troubled party forward.

In an address from his electorate office in Auckland, the 51-year-old today said his decision was a 'tough” one to make, but it is done with 'the best interests of the wider party” in mind.

Former Labour leader David Cunliffe.

Mr Cunliffe, who will remain a Member of Parliament for his seat of New Lynn, said: 'I have made the tough decision not to nominate the for the Labour Party leadership.

'It has been an absolute privilege to lead the New Zealand Labour Party over the past year. There is a strong heart in our movement and it is more relevant to New Zealand today than ever.

And in a ringing endorsement for Andrew Little, he added: 'I have enormous respect for Andrew and believe he is the right man for the job. He has enormous integrity and a strong vision that is consistent with our Labour Party values.

'I know that you will all have your own views, but I would encourage you to get to know Andrew over the coming weeks as I believe you will come to the same conclusion.”

The former Minister of Health has urged all Labour voters to get behind their new leader, whose identity will be revealed on November 18.