The Duchess Of Cambridge's Most Fashionable Looks

Taking a note from her sister Pippa, Kate Middleton dresses up for Wimbledon with a bright lemon-yellow and white dress by Roksanda.

The duchess wore a cream off-the-shoulder, jersey paneled dress by Barbara Casasola with a silver clutch and tan heeled sandals at the Natural History Museum in London.

Kate Middleton wears a white lace peplum dress with a scalloped hem, a hat by Lock & Co, black clutch and black pumps at the Somme Centenary Commemorations in France.

The Duchess of Cambridge wears a grey and black Missoni coat for the Battle of the Somme Vigil in France.

The Duchess of Cambridge attends day two of the Royal Ascot in a dreamy Dolce & Gabbana lace dress and Jane Taylor hat.

Kate Middleton attends a garden party in Northern Ireland in a beige coat dress by Day Birger et Mikkelsen with matching pumps and a rosette hat by Lock & Co.

The Duchess wears a bright red Catherine Walker coat dress accessorized with a matching headpiece at the Order of the Garter Service at Windsor Castle.

The Duchess attends the Queen's birthday tea party in London wearing a Roksanda dress with a nude clutch and pumps.

The Duchess of Cambridge celebrates Queen Elizabeth II's 90th birthday in London wearing a Catherine Walker coat, Jane Taylor hat and an L.K.Bennett clutch.

Kate Middleton stuns in a Roland Mouret cold shoulder gown at the 40th anniversary of SportsAid in London.

The Duchess dressed in all-white Alexander McQueen at a garden party at Buckingham Palace. It's the same ensemble she wore for Prince George's christening in 2013—cream-colored separates, hat and all.

The Duchess of Cambridge was seeing green at the Royal Chelsea Flower Show, where she wore a chic belted coat dress by Catherine Walker.

Kate Middleton had a chic nautical moment during her visit to the 1851 Trust and Land Rover Bar. The Duchess sported Alexander McQueen separates yet again while meeting with those involved in the sailing projects she's slated to launch with the Trust.

Middleton was all smiles at Queen Elizabeth II's 90th birthday celebration. She mixed high and low pieces for the occasion, layering a crimson Zara coat over her lace Dolce & Gabbana dress.

The Duchess went for a blush Alexander McQueen peplum set, paired with nude pumps while arriving at the the National Portrait Gallery in London, England.

The Duchess of Cambridge arrives to the Magic Garden playground opening at Hampton Court Palace wearing a gray Michael Kors coat that she previously wore back in 2014 for an Anzac Day remembrance service in Australia.

Underneath her Michael Kors coat, the Duchess wore a Roksanda Ilinčić dress, which she has worn on several different occasions from 2011 to her Australian trip in 2014. The royal paired the look with her trusty L.K. Bennett nude pumps.

Before Prince William and Kate Middleton begin their trip to India and Bhutan, they attended a pre-tour dinner, where the Duchess sported a bright cobalt gown with a plunging neckline by Indian designer Saloni.

Middleton looked chic in a monochromatic grey look, featuring an Erdem coat with eye-catching lace details, a wide-brimmed hat and velvet pumps as the royals attended the Commonwealth Day service in the year of the Queen's 90th birthday.

Middleton made a seamless transition into spring, sporting checkered separates in a bright sherbert hue by little-known British brand Epinone, causing their site to crash after stepping out in the ensemble. The 'Kate effect' strikes again.

Kate Middleton looked chic in a bright green coat and black pumps, while visiting St Thomas' Hospital in London to work towards preventing suicide with Prince William.

As Middleton stepped out to visit various community projects in Edinburgh, she paired her black turtleneck with a deep green coat, cinched at the waist with a skinny belt.

In accord with Scottish fashion, the Duchess also wore a kilt by new brand Le Kilt, as she made her first stop at St. Catherine's Primary School.

The Duchess knows the power of a black + white ensemble, pairing her high collar blouse with a tweed skirt for a polished look as Guest Editor of The Huffington Post.

Middleton stepped out in rich blue separates as she attended the Royal video message for Children's Mental Health week in London.

Joining Britain's Air Cadets to help them celebrate their 75th anniversary, the Duchess stepped out in a pale blue Alexander McQueen coatdress.

The Duchess of Cambridge recycled a chic, tweed suit by Michael Kors that she recently wore before the New Year—proving that even royalty wears the same thing twice.

The Duchess attended a post-Christmas service at St. Mary Magdalene Church in a sophisticated, tweed suit by Michael Kors, adding a royal blue hat and gloves to complete the look.

In a green belted SportMax coat attending the Christmas Day service at Sandringham estate.

The Duchess looked festive in red as she attended The Anna Freud Centre Family School Christmas Party in North London.

Wearing a bright blue pleated Emilia Wickstead dress at the Action to Addiction event.

The royal wears a black and white houndstooth Reiss coat, complete with black accessories.

For a trip to North Wales with Prince William, the royal opts for a gray Reiss coat, jeans and knee-high suede boots.

The Duchess steps out for the "My Head Is Too Full" in a pastel dress by Matthew Williamson, adorned with turquoise trim and teal accessories.

The Duchess of Cambridge attends the Fostering Excellence Awards at BMA House in London in a royal blue Saloni dress.

The Duchess of Cambridge signs the Book of Condolences at the French Embassy with Prince William to honor those lost in the terror attacks in Paris.

At the Festival of Remembrance at Royal Albert Hall in a black lace Dolce & Gabbana dress and Jimmy Choo pumps.

The Duchess dons Erdem for the 100 Women in Hedge Funds gala dinner at the Victoria & Albert Museum in London.

The Duchess of Cambridge visits Chance UK's Early Intervention Program at Islington Town Hall in London.

Kate wears Jenny Packham at the premiere of Spectre at Royal Albert Hall in London.

The Duchess of Cambridge attends a movie premiere in a Tabitha Webb dress.

In this turtleneck-layered look, the Duchess wore a royal blue Christopher Kane coat and black suede knee-high boots on her trip to Dundee, Scotland.

The Duchess steps out in a burgundy lace Dolce & Gabbana dress.

The Duchess makes a public appearance for World Mental Health Day wearing a Tory Burch dress with simple black pumps and a clutch.

The Duchess pays a visit to the Rehabilitation of Addicted Prisoners Trust, a women's prison in Surrey, England, in a modest dress by The Fold.

A bold blue Reiss coat at the Rugby World Cup opening ceremony in Twickenham, England

In one of her first post-maternity leave appearances, The Duchess of Cambridge sports a Ralph Lauren dress at the Anna Freud Centre in London.

Attending the Royal Variety Performance at the London Palladium in Diane von Furstenberg

At the Action On Addiction Dinner wearing Temperley London in London

Glowing in Jenny Packham at the Wildlife Photographer of The Year 2014 Awards Ceremony at The Natural History Museum in London

At the Tower of London in L.K. Bennett

Wearing Jaeger at the National Maritime Museum in Greenwich in London

L.K. Bennett and an Oroton bag for a trip to RAAF Base Amberley in Brisbane, Australia

Visiting Manly Beach in Sydney, Australia in a Zimmerman dress

Landing in Wellington, New Zealand, in a Catherine Walker coat

Attending a gala at the National Portrait Gallery in Jenny Packham

In Roland Mouret at the premiere of Mandela: Long Walk to Freedom

Shining in Jenny Packham at the Tusk Conservation Awards at The Royal Society in London

Red carpet-ready in Jenny Packham at the Olympic Gala in London

In Temperley at the UK premiere of War Horse

Velvet was the word for a chic black Alexander McQueen gown at the The Sun's Military Awards in London.

Flawless in a Diane Von Furstenberg coat and Jane Corbett hat at a Remembrance Day service at the Cenotaph war memorial in London

Lovely in a one-shouldered Jenny Packham dress at a charity gala at the St. James Palace in London.

Bold in a red L. K. Bennett coat and boots at a UNICEF Emergency Supply Center in Denmark

Wearing a vintage Amanda Wakeley gown at a charity gala at Clarence House in London

In a Beulah London dress for the 100 Women in Hedge Funds Gala at the St. James Palace in London

Minimal in a dress by Amanda Wakeley and L. K. Bennett shoes at the Royal Marsden Foundation Trust hospital in South London

A blouse and skirt by Alexander McQueen at a community center in Birmingham, England

A red carpet star in lavender Alexander McQueen and Jimmy Choo clutch and shoes at the BAFTA Brits to Watch event at the Belasco Theater in Los Angeles

A Whistles blouse and skirt worn to an Inner City Arts program in LA

In a Jenny Packham dress and L. K. Bennett shoes at a match at the Santa Barbara Polo and Racquet Club

Wearing a draped Roksanda Ilincic dress and L. K. Bennett clutch at an event at the Beverly Hills Hilton Hotel

Canada style in a Catherine Walker coat and L K Bennett shoes at the Calgary Zoo

In a gorgeous green Diane von Furstenberg dress in LA

More McQueen in a dress by the Brit label, paired with Prada shoes, L. K. Bennett clutch and Links of London earrings at the welcoming ceremony at Province House in Charlottetown, Canada

Lovely in a lace Erdem dress and L. K. Bennett shoes at a morning service aboard the HMCS Montreal in Champlain Harbor in Quebec

Elegant in a Joseph dress on Prince Edward Island

Reiss dress paired with Sylvia Fletcher at Lock and Co. hat, which she donned to the Canadian Museum of Civilization in Gatineu, Quebec

Showing a penchant for more lace Erdem while arriving at the Macdonald-Cartier International Airport in Ottawa, Ontario, Canada.

What else should a girl wear to a tennis match at Wimbledon than Temperley London?

Smart in a military-inspired coat by Alexander McQueen for a medal ceremony for the Irish Guard regiment

High street in a pretty Zara dress and Ralph Lauren jacket at a charity concert at Royal Albert Hall in London

More flawless McQueen for Trooping the Colour at Buckingham Palace

The Duchess took the public's collective breath away in a pink Jenny Packham dress at the ARK Gala dinner at Kensington Palace.

Hats off to a Reiss dress, Joseph jacket, and L.K. Bennett shoes and clutch, which she wore at the Derby Festival at Epsom Downs Racecourse.

Simple and elegant in Reiss again to meet Barack and Michelle Obama at Buckingham Palace

A more subdued "party version" of the church gown, The Duchess of Cambridge was McQueen all day at her wedding.

Does it need mentioning? The Duchess of Cambridge was a stunning bride in a white Alexander McQueen gown.

Proving the power of black and white in a Temperley London dress at a reception for the Teenage Cancer Trust in Fakenham, England

In a navy Issa dress announcing her engagement at St. James Palace