All Blacks star Dan Carter has had his second child, Fox.

All Blacks star Dan Carter's parents are looking forward to meeting their newest grandson.

Carter, 33, took to his official Facebook page on Monday to announce the birth of a boy named Fox William Carter.

Fox, born on Good Friday, was "healthy" and "handsome", the post said.

Carter's father, Neville, of Southbridge in Canterbury, said he and wife Bev were happy with the "tremendous" news.

"We hope to get up [to Auckland] to see them soon, when they're all back home and settled in, " Neville Carter said.

Fox is Carter's second son with wife, Honor.

The couple's first child, Marco James Carter, was born in 2013.

Neville Carter said his son flew home from the Crusaders' tour of South Africa a few days before Fox's birth.

Carter could be in line for a Crusaders recall against the Highlanders at AMI Stadium on Saturday.

"He will be available as far as selection goes, " Neville Carter said.

Honor, a former Black Sticks striker, married Carter in 2011.

Dan Carter's announcement via Facebook attracted nearly 18,000 likes in its first hour and attracted many "congratulations" comments.

Some Carter fan hopes of what his offspring might be able to achieve on the rugby field were evident in the comments too.

"Expect these brothers to be first five / second five combo for Crusaders and all blacks come 2035 World Cup...no pressure. Haha. Congrats to you and family," Nick Sugrue wrote.

"You can already tell he is going to have a great boot," Danyon Zach Roguski said.

"Those are the feet of A Future Rugby Star, the million dollar kicks," Laisenia V. Tale wrote.

"Between Fox and Carter the kid should be the best kicker of all time lol. Congrats bud," Warren Aitchison said.

Carter had been in South Africa the weekend before Easter playing in the Super Rugby competition for the Crusaders.

He had made a return to the No 10 jersey in a losing effort against the Bulls in Pretoria.

Carter returned to New Zealand afterwards with the Crusaders going on to beat the Sharks in emphatic fashion in Durban on Saturday (NZT Sunday).

The Crusaders return to Christchurch this week, where they will play against the Highlanders on Saturday.