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Heavily pregnant Kate Middleton, in her last public appearance, before going on maternity leave, was spotted with her husband Prince William at Westminster Abbey to celebrate the 60th anniversary of Queen Elizabeth’s coronation in London June 4, 2013 (Credit: Reuters/Andrew Winning)

Heavily pregnant Kate Middleton, in her last public appearance, before going on maternity leave, was spotted with her husband Prince William at Westminster Abbey to celebrate the 60th anniversary of Queen Elizabeth's coronation in London June 4, 2013 (Credit: Reuters/Andrew Winning)