Prince William 's younger brother will be his best man when he marries Philippa . • Meet the bride at the ceremony and arrange her dress and veil • Oversee the bridesmaids , flower girls and pageboys Armstrong-Jones 's sister William will be her maid of honor . The couple will have two bridesmaids and four page boys . William is second in line to the throne .
Prince William 's younger brother will be his best man when he marries Philippa . Armstrong-Jones 's sister William will be her maid of honor . The couple will have two bridesmaids and four page boys . William is second in line to the throne .