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Open Image ModalKate looked casual and cool in a Jonathan Saunders sweater while attending a children's rugby game in New Zealand on April 13, 2014. (credit:Getty Images)
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Open Image ModalKate was a standout in a pleated Emilia Wickstead dress as shearrived in Dunedin, New Zealand on April 13, 2014. (credit:Getty Images)
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Open Image ModalThe Duchess of Cambridge glowed in a Jenny Packham gown as she arrived at a London charity event on June, 9, 2011. (credit:ASSOCIATED PRESS)
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Open Image ModalKate exuded elegance in a body-hugging Jenny Packham dress while attending a state reception in Wellington, New Zealand on April 10, 2014. (credit:Getty Images)
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Open Image ModalKate sported a sunny yellow Roksanda Ilincic dress while visiting Sydney, Australia in April 2014. (credit:Getty Images)
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Open Image ModalThe Duchess wore a chic Zara blazer for a wine tasting event in New Zealand on April 13, 2014. (credit:Getty Images)
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Open Image ModalKate stopped traffic in a lovely floral-print frock by L.K Bennett while arriving at the Royal Australian Airforce Base in Brisbane on April 19, 2014. (credit:Getty Images)
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Open Image ModalKate looked casual, but chic in Hobbs while visiting Uluru/Ayers Rock in Australia in April 2014. (credit:ASSOCIATED PRESS)
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Open Image ModalThe Duchess kept things classy with a teal suit by LK Bennett while visiting Leicester on the first date of Queen Elizabeth II's Diamond Jubilee in March 2012. (credit:Max Mumby/Indigo via Getty Images)
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Open Image ModalKate attended the UK red carpet premiere of "Mandela: Long Walk to Freedom" in a Roland Mouret gown on December 5, 2013. (credit:Joel Ryan/Invision/AP)
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Open Image ModalKate opted for a dramatic Diane von Furstenberg printed frock during a trip to the Blue Mountains in Australia on April 17, 2014. (credit:Getty Images)
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Open Image ModalThe Duchess sported a tan Malene Birger frock during a welcome ceremony in Yellowknife, Canada on July 5, 2011. (credit:ASSOCIATED PRESS)
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Open Image ModalKate dressed down in a ME+EM ensemble to sail with Team New Zealand on April 11, 2014. (credit:Getty Images)
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Open Image ModalThe Duchess stepped out in an ice blue brocade Alexander McQueen skirt suit for the annual Trooping the Colour Ceremony on June 14, 2014. (credit:Getty)
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Open Image ModalThe Duchess arrived at UK's Creative Industries reception in July 2012 wearing a classy gray Roksanda Ilincic dress. (credit:Mark Cuthbert via Getty Images)
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Open Image ModalKate channeled Princess Diana in a red military-esque Catherine Walker coat while arriving in New Zealand on April 7, 2014. (credit:AP/SNPA)
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Open Image ModalThe Duchess of Cambridge stole the show in an Alice Temperley gown at the UK royal film premiere of "War Horse" in January 2012. (credit:Mark Cuthbert via Getty Images)
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Open Image ModalKate turned heads in this Alexander McQueen coat on day four of the Royal Tour to New Zealand on April 10, 2014. (credit:Getty Images)
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Open Image ModalThe Duchess stunned in a teal Jenny Packham gown while attending the London Olympic gala in May 2012. (credit:Mark Cuthbert via Getty Images)
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Open Image ModalThe Duchess of Cambridge sported a Michael Kors coat dress while visiting the Australian War Memorial in Canberra, Australia on April 25, 2014. (credit:Getty Images)
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Open Image ModalThe Duchess donned a lovely white cocktail dress by American designer Leila Rose at a reception in Canberra, Australia on April 24, 2014. (credit:Getty Images)
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Open Image ModalThe Duchess looked chic and polished as she arrived in Alberta, Canada in May 2011. (credit:Julian Parker via Getty Images)
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Open Image ModalKate appropriately donned a red Catherine Walker ensemble during a departure ceremony in Calgary, Alberta on July 8, 2011. (credit:Julian Parker via Getty Images)
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Open Image ModalKate attended the Royal Variety Performance on November 13, 2014 wearing an elegant black lace gown by American designer Diane Von Furstenberg. (credit:ASSOCIATED PRESS)
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Open Image ModalKate donned an Alexander McQueen coat for the Easter Sunday services at St. Andrews Cathedral in April 2014. (credit:Getty Images)
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Open Image ModalKate wore a long-sleeved nude and lace Alexander McQueen dress for a Buckingham Palace garden party in June 2014. (credit:Getty)
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Open Image ModalKate kept things simple in a white Jaeger dress as she attended a breakfast reception in London in October 2014.
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Open Image ModalThe Duchess sparkled in a silver Jenny Packham gown at the Tusk Foundation Gala in September 2013. (credit:Getty)
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Open Image ModalThe Duchess of Cambridge stunned in another Jenny Packham dress on October 24, 2013. (credit:ASSOCIATED PRESS)
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Open Image ModalKate proudly sported a red and white ensemble during a Canada Day celebration on Parliament Hill in Ottawa on July 1, 2011. (credit:ASSOCIATED PRESS)