Young Prince George with his newborn sister, Princess Charlotte.
Prince George on a royal family trip to Australia.
Prince George at Christmas 2014.
Prince William and Catherine, the Duchess of Cambridge, gave the world its first glimpse of Prince George Alexander Louis when they left St. Mary's Hospital in London on Tuesday, July 23, 2013.
William joked George has "a good set of lungs" and his mother's good looks.
The prince even took his son into his arms and walked about with him while answering reporters' questions, showing he truly wants to be a hands-on father.
The young prince, third in line to the British throne, is known as His Royal Highness Prince George of Cambridge.