kate middleton blue dress Tonight at Windsor Castle, Middleton—Catherine, Princess of Wales—sparkled in a cape gown by Jenny Packham for the state banquet honoring German president Frank-Walter Steinmeier and his wife, Elke Büdenbender. She Marilyn Monroe's 'Happy Birthday Length:KNEE LENGTH Color:Ivory Lace+Ivory Lining

kate middleton blue dress Tonight at Windsor Castle, Middleton—Catherine, Princess of Wales—sparkled in a cape gown by Jenny Packham for the state banquet honoring German president Frank-Walter Steinmeier and his wife, Elke Büdenbender. She Marilyn Monroe's 'Happy Birthday Length:KNEE LENGTH Color:Ivory Lace+Ivory Lining

Marilyn Monroe's 'Happy Birthday to JFK' gown to be auctioned

Made from a black striped material, featuring a boat neck design, short sleeves, and a flattering A-line fit

Length:KNEE LENGTH

Color:Ivory Lace+Ivory Lining

Common Mistakes to Avoid Even an elegant dress can become difficult to wear when practical details are overlooked