ABC News' Joshua Hoyos reports:

Trading in diapers and baby bottles for a polo pony, the world got a glimpse of Prince William in public for the first time since the birth of his son, Prince George.

On Saturday, Prince William participated in a charity match with Prince Harry as he finishes his paternity leave.

David M. Benett/Getty Images

The newborn prince and his mother, Kate Middleton were not at the event, instead they remain at the Middleton's family home in Buckleberry.

Prince William and Kate Middleton Show off Royal Baby Boy: See the Photos

At the end of the polo match, Prince William was presented with a gift - which he asked "is it nappies?"

"I've got to pick some up on my way home," he said.

Prince William Makes 1st Public Appearance Since Son's Birth: See the Photos

Although Prince George was not in sight, he was not out of mind, as Prince William told reporters that his mind was more focused on the future king than the game at hand.

"I was in baby mode out there, thinking about nappies, I wasn't really in the zone," he told reporters.

The Duke of Cambridge is completing his paternity leave on Monday and will report back to his air force duties in Wales.

On Friday, the palace formally registered the birth of the third in line to the throne.

See Prince George's Birth Registration

The application signed by William listed the occupations of the new parents as prince and princess of the United Kingdom.