LONDON - APRIL 21:  A detail of the 'Instrument of Consent', which is the Queen's historic formal consent to Prince William's forthcoming marriage to Catherine Middleton, is displayed at the Crown Office at the House of Lords on April 21, 2011 in London, England. Under the Great Seal of the Realm, Queen Elizabeth signed an elaborate notice of approval which proclaimed, in transcribed calligraphy, consent to the union of "Our Most Dearly Beloved Grandson Prince William Arthur Philip Louis of Wales, K.G. and Our Trusty and Well-beloved Catherine Elizabeth Middleton".  (Photo by Clive Gee/WPA Pool/Getty Images)