Middleton stunned in a custom-made white Giles Deacon gown with capped sleeves, a corseted bodice, draped front, and heart-shaped detail in the back. Deacon has dressed some of the biggest stars in Hollywood including Cate Blanchett, Sarah Jessica Parker and Kate Hudson.
"I was thrilled to work with Pippa on her wedding dress," Deacon told the press."It's a privilege to show the craftsmanship that my team produces in London and a real testament to Pippa's support of British fashion."
Pippa accessorized the look with a veil crafted by milliner Stephen Jones, a Maidenhair Fern tiara and matching hairpiece from Robinson Pelham, and Manolo Blahnik heels made of ivory satin and pearl detailing.
The Duchess of Cambridge let her sister shine on her big day, opting to avoid the crowds and press prior to the ceremony. Her husband, Prince William, was spotted with his brother, Prince Harry, outside of the church ahead of the ceremony. William and Kate's two children, Prince George, 3, and Princess Charlotte, 2, served as page boy and a bridesmaid for their aunt’s big day.
Though Prince Harry was in attendance, his girlfriend, Meghan Markle, was not in immediate sight. ET previously reported that the Suits star had requested a week off from shooting her USA network show to join him for part of the festivities and was spotted out in London on Friday.
Other royal and celebrity guests in attendance included Princess Eugenie and tennis pro Roger Federer.
Following the ceremony, guests headed to a champagne brunch at the Englefield House, the private estate close to St. Mark’s Church. The formal dinner is scheduled to take place at the private home of the Middleton family in Bucklebury, England.
Middleton and Matthews first started dating in 2012, but only for a few months. They later rekindled their relationship in January 2016 after Middleton split from her longtime beau, Nico Jackson. The two got engaged last July and confirmed the big news through an official Kensington Palace spokesperson.
For more on the happy couple, watch the video below.