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Pippa Middleton, sister of Catherine, Duchess of Cambridge, arrives for a semifinal between Spanish player Rafael Nadal and British player Andy Murray at at the Wimbledon Tennis Championships at the All England Tennis Club, in southwest London on July 1, 2011. AFP PHOTO / GLYN KIRK RESTRICTED TO EDITORIAL USE (Photo credit should read GLYN KIRK/AFP/Getty Images)

Pippa Middleton

Pippa Middleton, sister of Catherine, Duchess of Cambridge, will write a column for the upmarket chain's monthly magazine, Waitrose Kitchen, called "Pippa's Friday Night Feasts." (Reuters)