On Monday, Prince William and Catherine, Duchess of Cambridge, celebrate a very special birthday. Her eldest child, Prince George, is six years old!
Before the big day, Kensington Palace gave the royal fans a small gift: new photos of former Kate Middleton and the soon-to-be birthday boy of Prince William.
The Duchess made these photos herself.
The moment between mother and son is invaluable.
On July 23, 2013, the world first saw Prince George Alexander Louis on the steps in front of the Lindo Wing of St. Mary's Hospital in London.
Over the years, fans have followed his adventures with Sister Princess Charlotte, 4, and later, younger brother Prince Louis, 1.
From exchanging lore to romping at public events, the three siblings spent time getting themselves together to approach the public.  Prince William, Duke of Cambridge, and their children Prince George, Princess Charlotte, and Prince Louis will perform at the Royal Horticultural Society's Chelsea Flower Show on May 19. Getty Images
Some have even started asking if the Duke and Duchess will get a fourth child.
When Middleton was asked, he joked, "I think William may be a bit worried."