Six60 will be the first music act to perform at Eden Park following a long battle to allow big concerts there.
An independent panel decided last month to relax the rules, and allow six concerts a year at the stadium.
Previously, there were strict rules and promoters had to make long and expensive individual applications.
Plans for a fundraising concert there in 2018 were abandoned because of that process.
The Six60 show on 24 April could have an audience of up to 50,000 people, making it potentially one of the biggest live shows since the start of the Covid-19 pandemic.