Watch: Prime Minister Jacinda Ardern's Waitangi speech

Prime Minister Jacinda Ardern made a rousing speech at Tuesday morning's Waitangi pōwhiri, explaining there's a lot more work to be done to help Māori development.

Waitangi celebrations are underway after a pōwhiri welcomed political leaders onto the marae at the Treaty Grounds in Northland.

A number of party leaders spoke, including Green Party co-leader James Shaw, National Party leader Simon Bridges, New Zealand First leader and Deputy Prime Minister Winston Peters, and Ms Ardern.

She said it had been "one year since I asked all of you to hold all of us, and myself, to account".

"There is still more to do. And I didn't learn that looking at numbers on a page, I learnt that visiting the city mission. I can see that there is still more to do."

Watch the full speech above.