Rodney Hide and wife Louise are celebrating the arrival of a baby boy.
Errison Hide was born in the early hours of Thursday weighing 3.9kg.
Hide told the Herald on Sunday that he was "punching the air that he's a boy", a brother to Liberty, 3, and Grace, 22 months.
"I love the girls and didn't mind the gender but ... we're going to do boy things together."
Hide, 57, said mum and baby were doing well — and the family was enjoying another child.
The name Errison comes from Greek mythology.
Hide and Louise, 36, a former professional squash player who represented New Zealand at the 2006 Commonwealth Games, married in 2010.