The revelers were rowdy and the champagne was flowing as word of the baby prince spread around London and the world. Everyone seemed to have an opinion on the royal birth.
Canada and New Zealand, both former British colonies, as well as the British Navy presented their own celebrations to fete the newborn. Niagara Falls (the Canadian side, at least) was turned blue for the evening in honor of the baby boy.
A ceremonial gun salute rang out Tuesday afternoon — 41 guns in Green Park and 62 from the Gun Wharf at the Tower of London — as part of tradition in welcoming the future monarch.
Australian Prime Minister Kevin Rudd wishes Will, Kate, and the new prince happiness — with a shoutout to Prince Charles and Camilla, as well, for being first-time grandparents.
A horse-drawn procession passes by the crowd gathered outside Buckingham Palace.
Read TIME’s previous feature about why the royal baby will be such a figure of global influence
Read TIME’s original 1982 story about the birth of Prince William