New Zealand will host the next round of the Trans-Pacific Partnership trade negotiations.
Hundreds of negotiators from 11 countries around the Asia Pacific region are expected to attend the nine day meeting in Auckland in December.
The TPP will create New Zealand's largest free trade area.
Canada and Mexico will be at the talks for the first time since joining the trade group in June.
Trade Minister Tim Groser says the participation of both countries marks a significant turning point in terms of building a truly regional agreement.
The inclusion of Mexico and Canada brings an additional $1 billion of New Zealand exports under the partnership.
New Zealand last hosted a Trans-Pacific Partnership meeting in December 2010.