Prince George made a record in royal history on his first birthday, as it was the first time in living memory that a future monarch has celebrated the milestone birthday with both of their parents.
When his dad Prince William turned one, Prince Charles and Diana, Princess of Wales were in Canada for an 18-day royal tour. The family celebrated William's special day about two weeks later, upon their return to Britain.
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Back in 1949, the Duke of Edinburgh was in Malta on naval duty when Prince Charles had his first birthday, and when Queen Elizabeth II turned one, the Queen's mother was absent.
Not only was Prince George lucky enough to be doted on by both of his parents, the trio were joined by many family members at William and Kate's home in Kensington Palace for an afternoon tea party.
George's grandparents Carole and Michael Middleton, along with his aunt Pippa and uncle James, were all in attendance for the family occasion.
Four of George's godparents, Julia Samuel, William van Cutsem, Emilia Jardine-Paterson and Jamie Lowther-Pinkerton were also spotted driving into the Palace bearing gifts for the little one.
Even Prince George's great-grandmother, the Queen, made it to the future King's special birthday bash. Her Majesty arrived solo just after 4pm, as the Duke of Edinburgh had previous engagements he had to attend.
Other family members at the low-key event include Prince Harry, along with Prince and Princess Michael of Kent.
Zara Phillips, another one of George's godmothers, also headed to Apartment 1A on Tuesday afternoon, accompanied by her husband Mike Tindall and baby daughter Mia.
William's former Nanny Jessie Webb – who helped William and Kate adjust to new life as parents in the months leading up to George's baptism – also attended the royal celebration.