Prime Minister John Key and six ministers will fly to Sydney this week for a joint cabinet with Australian Prime Minister Tony Abbott and ministers.
Mr Key will also take a business delegation and address a business luncheon.
He will take with him Deputy Prime Minister and Finance Minister Bill English, Economic Development Minister Steven Joyce, Justice Minister Judith Collins, Health Minister Tony Ryall, Environment Minister Amy Adams and Immigration Minister Michael Woodhouse.
Mr Key made the announcement today at his post cabinet press conference.
He said they would discuss the 2015 Cricket World Cup which New Zealand and Australia are co-hosting, the centenary of Gallipoli next year, and the issue of the treatment of New Zealanders living in Australia.