Prince William and his brother, Prince Harry, popped up today in Gayton, England, to celebrate the wedding of their close friends Lady Laura Marsham and James Meade. The brothers were joined by Prince William's sister-in-law, Pippa Middleton, at the affair, which Kate Middleton was expected to attend as well. Prince William has had a busy week of appearances since he and Harry attended the funeral of their father's friend on Wednesday before joining in on the BGC Partners Charity Day in honor of the victims of the Sept. 11 attacks. Prince William also had a date night on Thursday with his wife at the Tusk Conservation Awards in London. Kate sparkled in a Jenny Packham gown for the occasion, which was her first big night out since giving birth to Prince George back in July.