The young Prince, who celebrated his first birthday on 22 July, has been described as "quick on his feet" by the Press Association photographer who took the official pictures for George's birthday, and it seems the little one may also be quick in the pool.
Kate regularly takes George swimming at Buckingham Palace, and it is thought this is where the two went on the morning of his birthday.
The Duke and Duchess have been attending the 2014 Commonwealth Games
His father, Prince William, also recently revealed that bath time with the toddler is not the easiest of tasks.
Speaking after he put onhis aqua gear at the British Sub-Aqua Club (BSAC) gathering earlier this month, he joked: "At the moment bath time is quite painful, but hopefully donning a snorkel and mask might calm him down."
Kate couldn't hide her emotions on Monday as she attended the fifth day of the 2014 Commonwealth Games being held in Glasgow.
Taking in a boxing match and a hockey game, Kate winced, laughed, and held her hands tight in suspense as she visted the Games with William and Prince Harry.