As the nation waited for a first glimpse of the new royal baby, people from around the North East had their own reasons to celebrate - including baby Ella Kate Watson, who was born at the same time in the Queen Elizabeth Hospital in Gateshead.
She qualifies for a commemorative five pound coin issued to all infants who now share a birthday with the new prince.
The latest addition to the royal family has been named Prince George Alexander Louis, but where did the Prince get his names?
The Duke and Duchess of Cambridge have named their son George Alexander Louis, Kensington Palace said.
With the imminent arrival of the Duke and Duchess of Cambridge's firstborn here are some of the more unusual facts about royal babies.