In a timely twist, the tiara's twin, which belonged to Nancy's sister, is on display in the Cartier exhibition at London's Victoria and Albert Museum.

At Cartier, the Love Bracelet quickly grew in popularity, popping up on the biggest celebrity couples of the 1970s, such as Elizabeth Taylor and Richard Burton ... 62,000 for a diamond pavé ...

Styled by her longtime stylist Samantha McMillen, Fanning wore a white lace gown by Sarah Burton for Givenchy ... she accessorized with a diamond Cartier choker necklace from 1958 that was ...