Princess Anne of England matched a fun orange hat to her suit at the Ascot Racecourse in 2009, the same year Kate paired a matching hat with her lavender coat at the wedding of a British aristocrat.
Princess Charlotte Casiraghi of Monaco looked ready to ride in 2003 at the International Horse Jumping Show. Kate Middleton went for a similar look with tall riding boots and a crisp white skirt in 2007 at the Badminton Horse Trials.
Princess Caroline of Monaco looked chic in a classic trench in London in 1973. The same style still looked fresh on Kate Middleton in 2008 as she watched Prince William receive his military pilot's wings.
Princess Diana wore a red coat and black hat on Christmas Day in 1993. Kate wore the same winning combination during the 2006 holidays.
Princess Diana wore a feathered hat for outing in Pembrokeshire in 1981, while Kate Middleton wore an almost-identical one to a wedding in 2006.
Crown Princess Victoria of Sweden wore a beautiful bronze silk gown to a banquet for the Danish Royals in 2007. Kate opted for an elegant chrome-colored gown for the annual Starlight Children's Foundation event in 2009.