The adorable eight-month-old was the centre of attention at the group, organised by the Royal New Zealand Plunket Society, even managing to steal attention from his world famous mother.
The too-cute tot is set to be a trend setter following in his mother's footsteps, with many fashion watchers commenting on his navy dungarees The Duchess of Cambridge went for low key glamour to play with her infant son, wearing a black and white pattenred dress by American designer Tory Burch at a €295 price tag.
She proudly carried the heir to the throne in her arms, before setting him down to play with the carefully selected group of babies.
And Prince William managed to avoid the cameras altogether, joking with other parents that the atmosphere was 'mad' with babies.
Kate commented that George had just begun teething to the mother of one of his new pals, a girl called Paige.
The purpose of the playgroup was to introduce Prince George to the world in a low pressure setting, integrating with other children. And it's believed to be the first time he has been put in a playgroup setting.
He fit in perfectly with the crowd, grabbing at many toys, pulling his mother's hair and making new friends.
All of the babies chosen for the playgroup are within weeks of his July 22nd birthday and were chosen by the Royal Society based on age and ethnicity.
The young royals have just returned from a two day spa break in the Wellington area and will soon travel to Australia for the next leg of their tour Down Under.