Pippa Middleton and James Matthews exit the church after their wedding ceremony at St. Mark's Church on Saturday, May 20, in Englefield, England. Samir Hussein/WireImage/Getty Images

Pippa Middleton and James Matthews leave St. Mark's Church following their wedding. Kirsty Wigglesworth/PA Wire/AP

Prince George, fourth from the left, stands with other page boys and flower girls after the wedding. Kirsty Wigglesworth/AP

Pippa Middleton and her father, Michael Middleton, stand at St. Mark's Church before the ceremony. UK Press Pool/Getty Images

Britain's Prince Harry and other guests leave St. Mark's Church after the wedding ceremony. Justin Tallis/AP

Catherine, Duchess of Cambridge, walks with her daughter, Princess Charlotte, a flower girl, and son, Prince George, following the wedding. JUSTIN TALLIS/AFP/Getty Images

Prince George waves as he leaves in a car after attending his aunt's wedding. Justin Tallis/AP

Prince William, Duke of Cambridge, and Prince Harry walk to the church. JUSTIN TALLIS/AFP/Getty Images

Carole Middleton and her son, James, arrive for the wedding of her daughter Pippa and James Matthews. Justin Tallis/AP

Princess Eugenie and Jack Brooksbank arrive for the wedding. Kirsty Wigglesworth/AP

Roger Federer and his wife, Mirka, arrive at the wedding. Kirsty Wigglesworth/PA Wire/AP

Guests arrive ahead of the wedding. Andrew Matthews/PA Wire/AP

Onlookers sit on a fence and watch guests arrive. Tim Ireland/AP

Television personality Donna Air, left, arrives at St. Mark's Church. Justin Tallis/AP

Guests arrive ahead of the wedding. Andrew Matthews/PA Images/Getty Images