It is one of 17 chicks to hatch from 17 eggs at the colony at Taiaroa Head on the Otago Peninsula this season.
The successful hatching of 100% of the fertile eggs produced this season was a first in 16 years, Department of Conservation Taiaroa Head ranger Lyndon Perriman said.
It was a milestone for staff at the colony, who expected to lose some chicks every season through fly strike and bacterial or fungal infection.
The female pairing had attracted worldwide media attention during the summer, especially in the Australian gay media.
The hatching of their chick was full of "drama" as it was not fed in its first 48 hours, Mr Perriman said.
Staff stepped in and shifted the chick to a "foster" parents' nest for a night, where it was fed.
It was then returned to the two females.
Colder, foggy weather at Taiaroa Head is one of the reasons for the successful hatching.
The eggs, which took three to six days to hatch, were hatched in an incubator before being returned to their parents.
Also important was the hatching of a chick from a pairing which included one parent from a Chatham Islands colony, which brought new genes into the population.
During the next few months, the chicks will have to cope with heat, humidity, the risk of fly strike and predators.
For the next six weeks, their parents will take turns guarding and feeding their chicks.
They will then be left unattended while both parents forage at sea for enough food to feed them.
Royal Albatross Centre manager Sam Inder said media outlets and Tourism New Zealand were very interested to hear about the success of the female pairing.
Visitors to the centre also asked about the pair.
They could not be seen from the centre because they had nested on an exposed ledge.
