Britain's Prince George celebrates his first birthday on Tuesday, capping a year in which the globetrotting infant became the trend-setting face of the modern royal family. The young prince will mark the occasion with a low-key party at the family home at Kensington Palace, in keeping with the wishes of his parents William and Kate to keep their first-born out of the media glare.They released a brand-new portrait of the tot walking around on July 19, duh!In typical British royal fashion, Prince George commemorated his first birthday by posing for an official family portrait and it’s just the cutest. The little prince showed the world he’s up and walking, which his sure to make Kate Middleton,and Prince William, proud!