Catherine, Duchess of Cambridge (L) talk [Getty Images]

Catherine, Duchess of Cambridge (L) talks to former German tennis player Steffi Graf (R) in the Royal Box on Centre Court on day nine of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London, on July 4, 2012. AFP PHOTO / LEON NEAL RESTRICTED TO EDITORIAL USE (Photo credit should read LEON NEAL/AFP/GettyImages)

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