Sonny Bill's new baby makes a star appearance

SBW pushing Imaan (also inset) in a stroller. Photos / Niall Williams, Instagram

Sonny Bill Williams has been reunited with his young family after yet another code-hopping, country-crossing shift.

The 29-year-old star has been joined in Hamilton by wife Alana Raffie and 8-week-old Imaan, who is pictured here for the first time.

Photos on social media show Williams, 29, taking Imaan for a walk in a pram and a montage shows children of the Williams clan.

Williams told the Herald this week that he had been missing his family like "crazy" while they were in Sydney.

He said the Chiefs had set them up with a home. "It's a really chilled-out environment and obviously being a new father it's an awesome place for me and my wife to start a new life with a little one."

And he even enjoyed the dreaded sleepless nights.

"Sometimes I love it when you hear a funny noise in the middle of the night and you jump up and make sure they are still breathing.

"Life is a beautiful thing and I've definitely been blessed to have a child and I just want to be the best father I can."

Family and friends have been making the young parents feel at home. Williams' sister Niall wrote: "Quick stop in to see my beautiful niece Imaan before heading to whakatane for touch ... "

Williams said having a child had made him more determined to do well in boxing and rugby to provide for his family.

He has a huge year ahead: a third season with the Chiefs' Super Rugby side and then a tilt at helping the All Blacks become the first back-to-back Rugby World Cup-winning team.

Before that, he will fight American Chauncy Welliver in his seventh professional fight.