Philippa Charlotte "Pippa" Middleton (born 6 September 1983) is the only sister of Catherine, Duchess of Cambridge.
A party organiser, she is well known because of her sister and through the reporting of society news. On 29 April 2011, she was the maid of honour at her sister's Royal wedding, which she helped to organise.
Her role in the televised wedding resulted in widespread media coverage and public admiration for her dress and appearance. (Source: Wikipedia)