Dominic Lipinski - WPA Pool/Getty The first and only time Kate ever wore the Cartier Halo Tiara (so far, anyway) was on a day she’ll remember forever — her April 29, 2011 wedding day to William.
This adaptable Swedish wedding tiara allows its wearer an infinite choice of gemstone toppers which may be attached to the tip of nine diamond palmettes, each separated by delicate diamond spears.