DARWEN, UNITED KINGDOM - APRIL 11:  Kate Middleton, fiancee of Britain's Prince William, smiles as she greets members of the public during a visit to Witton Country Park on April 11, 2011 in Darwen, England. With less than three weeks to go until the Royal Wedding Prince William and Kate Middleton are making one of their final public appearances.  (Photo by Alastair Grant - WPA Pool/Getty Images) *** Local Caption *** Kate Middleton