Auckland Mayor and former Labour leader Phil Goff has congratulated Jacinda Ardern on becoming Prime Minister, saying she has taken the party from electoral disaster to electoral victory.
Goff said he had been blown away at how she had shown her mettle since taking over the Labour leadership and hit the ground running with confidence, energy and freshness.
He said Ardern - a person of honesty and integrity who worked for Goff when he was a cabinet minister - will bring a requisite set of talents to the job of Prime Minister, which will be no easy role.
Goff also paid tribute to out-going Prime Minister Bill English, who he admired as an evidence-driven politician.
"He can look back on what he has achieved for New Zealand and be very proud."