Princess Kate And Prince William Celebrates 4th Anniversary Today

It was the moment the nation had been waiting for: In front of a sea of cheering well-wishers, Catherine Middleton emerged from her car outside Westminster Abbey and took her first steps towards a new husband - and a new life.

Fast forward four years and Miss Middleton, now the Duchess of Cambridge, is mother to a royal heir in the shape of Prince George and about to give birth to another.