When it comes to wedding guest style, the Princess of Wales rarely misses, and her appearance today has provided us with plenty of inspo for those attending summer celebrations this season. Joining guests at Peter Phillips and Harriet Sperling's wedding, Princess Kate showcased her signature elegant and polished aesthetic in an outfit that perfectly blended designer pieces with a surprisingly affordable accessory. For the wedding, Kate wore a sophisticated, beige dress by Roland Mouret , priced