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FacebookDiana at the Royal Ascot race in Ascot, England, on June 15, 1988; Kate on the first day of the 2017 Wimbledon.
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FacebookDiana in an Alistair Blair-designed outfit and Milliner Philip Somerville-designed hat during a visit to Munich, Germany, in 1987; Kate in a Michael Kors coat dress during a service of commemoration in London in 2017.
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Shutterstock/SplashDiana at the Remembrance Sunday Service in 1991; Kate in a Diane Von Furstenberg coat at the same service in 2016.
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FacebookDiana in Bruce Oldfield at a movie premiere in November 1991; Kate in Beulah London at a reception in Thimphu, Bhutan in April 2016.
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FacebookDiana in Jasper Conran during a visit to Canada in June 1983; Kate visiting Bacon's College in July 2012.
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FacebookDiana in Yuki before a dinner in Japan in May 1986; Kate in Jenny Packham at a Bollywood gala in Mumbai, India in April 2016.
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FacebookDiana attending a premiere in London's West End in April 1993; Kate in Temperley London meeting the Prime Minister of India in New Delhi in April 2016.
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FacebookDiana in Catherine Walker on a visit to the Isle of Wight in May 1985; Kate in Alexander McQueen at Princess Charlotte's christening in July 2015.
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9Diana in 1988; Kate leaving for Clarence House for the reception following her wedding in April 2011.
10Diana in Versace at a dinner at the Field Museum of Natural History in Chicago in June 1996; Kate celebrates Canada Day in an Issa dress during the Royal Tour of North America in July 2011.
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11Diana at Buckingham Palace in 1980; Kate wearing Alexander McQueen in Charlottetown, Canada during the Royal Tour of North America in July 2011.
12Diana in Bruce Oldfield at the Grosvenor House Hotel in London, March 1985; Kate in Jenny Packham at the National Memorial Arboretum Appeal at St James's Palace in London, November 2011.
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13Diana wearing Catherine Walker in Sicily during the Royal Tour of Italy in April 1985; Kate in Emilia Wickstead at a garden party at Buckingham Palace in May 2012.
14Diana in Melbourne in October 1985; Kate in Jenny Packham at Royal Albert Hall in May 2012.
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15Diana at the Royal Ascot in June 1986; Kate in Singapore during the Diamond Jubilee Tour in September 2012.
16Diana in a dress by the Emanuels at a dinner at the German Embassy in London in 1986; Kate at an official dinner hosted by Malaysia's head of state in Kuala Lumpur during the Diamond Jubilee Tour in September 2012.
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17Diana in a coat by the Emanuels while touring Venice with Charles in 1985; Kate wears Alexander McQueen while visiting St Andrew's School, her alma mater, in November 2012.
18Diana in Catherine Walker at Easter services in April 1987; Kate wears a Matthew Williamson coat while visiting Pembroke Refinery in Pembroke, Wales in November 2014.
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19Diana in Bruce Oldfield at an official dinner in Lisbon, Portugal in February1987; Kate in Jenny Packham at the 600th Anniversary Dinner for St Andrew's in December 2014.
20Diana visits Westminster in June 1990; Kate visits the Stephen Lawrence Centre in London in March 2015.
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