CLICK ON PHOTOS FOR GALLERY
She was marrying 33-year-old Patrick Heathcoat Amory, son of Sir Ian and Lady Heathcoat Amory of Calverleigh, Devon.
The entire Middleton family was on hand to share her joy, including Michael's wife Carole and son James.
For the occasion, Kate had chosen an Erdem dress that had a previous outing at the Trooping the Colour ceremony.
Meanwhile, Pippa, an expert at wedding style having attended countless ceremonies in the last 18 months, looked pretty in a gold ensemble.
Watch: Prince William takes George to meet his sister
It's a little princess!