Goff revealed Auckland's gift for baby Sussex - and it seems council staff have been busy knitting.
"As a gift from Auckland, council staff have knitted some beautiful woollen clothing for their future baby and we are also presenting two children's books - A is for Auckland and A is for Aotearoa - to remind them of their visit here," he said.
"We are looking forward to welcoming the Duke and Duchess of Sussex and taking advantage of the coverage of their visit by the world media to showcase our city.''
The Duke and Duchess are also due to take part in a gumboot-throwing competition while in Auckland; as well as meeting representatives of the Pillars charity - a charity set up for the children of prisoners.
The royal couple will later attend a reception hosted by the Prime Minister, Jacinda Ardern.