From Greenham Common to the United States, Venezuela and back again to New Zealand, Kara Nelson and Maynie Thompson have been in the front line of peaceful protests against nuclear power and weaponry.

Now 25 years after New Zealand was declared a nuclear free country by David Lange's government, the nonagenarian pair will be celebrating at Aotea Square on June 9.

The celebration of peace hosted by Grant Bridger will feature singers like Caitlin Smith and Shona Laing, speakers like Christchurch mayor Bob Harvey and Steve Able from Greenpeace, an exhibition, stalls and the release of 100 doves.

Kara, also known as Kit, and Maynie were part of the Women's Peace Walk in May 1983 and the Great Peace March for Global Nuclear Disarmament across the US in 1986, after which Maynie spoke for disarmament in Washington DC.

Both women also visited Tahiti with the Women's Peace Flight in 1996 to appeal to the French government to stop nuclear testing in French Polynesia.

They first met selling tea and scones at the Ostend market and eventually became the subject of a 2009 film by Susi Newborn and Claudia Pond Eyley called Kit and Maynie – Tea, Scones and Nuclear Disarmament.

Given their history of walking in protest, the day will begin with a walk from Artworks down to Matiatia at 10am in time to catch the 11am ferry. They are inviting everyone to join them.

Ms Nelson says Waiheke Island was one of the first places in New Zealand to state it was anti nuclear.

"We joined several other communities to declare our island nuclear free," Ms Nelson says.

Waiheke is home to several other peace protesters including former crew of the Rainbow Warrior.

The Auckland City for Peace Celebration Event runs from 12 to 3pm on Saturday, June 9 at Aotea Square.

- Waiheke Marketplace