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Catherine, Duchess of Cambridge, participates in a SportsAid Athlete Workshop in London on Friday, October 18. She showed up for the charity event in skinny jeans, a smart blazer and wedges. Click through to see more photos of her style through the years. Karwai Tang/WireImage/Getty
Catherine, Duchess of Cambridge attends the Tusk Trust Conservation Awards at The Royal Society on Thursday, September 12, in London. Samir Hussein/WireImage/Getty images
Kate and Prince William start the Ring O'Fire Anglesey Costal Ultra Marathon In Holyhead, Wales, on Friday, August 30. It was Kate's first public appearance since the birth of Prince George. Mark Cuthbert/UK Press/Getty Images
Kate at the Ring O'Fire Anglesey Coastal Ultra Marathon on August 30. Mark Cuthbert/UK Press/Getty Images
Kate, has proved to be quite the fashionista since her relationship with Prince William catapulted her into the limelight. Arthur Edwards - WPA Pool/Getty Images
Showing off her new 'do on November 27, she wore a green Mulberry dress to the opening of The Natural History Museum's Treasures Gallery in London. Dominic Lipinski - WPA Pool/Getty Images
Prince William and Catherine dress casually for a walk through the Danum Valley research center in Sabah, Malaysia, on September 15. VINCENT THIAN/AFP/GettyImages
The duchess donned a white and gold gown by Alexander McQueen for a dinner hosted by Malaysia's head of state on September 13. Mark Large - Pool/Getty Images
Wearing a white suit by Alexander McQueen, the Duchess of Cambridge arrived at Singapore's Gardens by the Bay on September 12. Chris Jackson/Getty Images
She wore a Prabal Gurung dress while visiting the Istana in Singapore on September 11. "So xctd that I just stopped some strangers on the street n showed them the pic of Kate Middleton in our dres," Prabal Gurung tweeted that day. Chris Jackson - Pool/Getty Images
Also on July 26, she and Prince William visited Bacon's College in London. The grey and white Hobbs dress she wore sold out quickly. RICHARD POHLE/AFP/Getty Images
The Duchess of Cambridge stunned in a Jenny Packham gown at an event hosted by the British Olympic Association. The teal number, complete with a lace back, is just one of her many noteworthy looks. Getty Images
Kate donned a belted emerald coat by Emilia Wickstead on St. Patrick's Day in Aldershot, England. She accessorized her ensemble with a gold shamrock brooch -- a royal heirloom, according to The Telegraph. Getty Images
She ditched her usual heels and fascinator to play field hockey with Great Britain's women's team wearing tangerine-colored jeans. Getty Images
Kate wore a printed Orla Kiely coatdress while visiting Rose Hill Primary School in Oxford. That day, Lucky magazine reported that the jacket had already sold out in stores and online. Getty Images
Wearing a gray coatdress, the Duchess of Cambridge posed for pictures at the National Portrait Gallery in London. Getty Images
Prince William kept his wife dry at the London premiere of "War Horse" on January 8, 2012. She wore a black lace Alice by Temperley gown and carried a black clutch. Getty Images
Kate wore an Amanda Wakeley gown to a reception at London's Clarence House on October 26 2011. Getty Images
Clad in Alexander McQueen, she arrived for BAFTA's Brits to Watch event in Los Angeles on July 9 2011. Getty Images
Earlier that day, Kate attended the Foundation Polo Challenge wearing a knee-length, floral Jenny Packham dress. Getty Images
Kate wore a green Diane Von Furstenberg frock in Los Angeles on July 8 2011. Getty Images
That same day, she attended an event at the Beverly Hilton hotel wearing a knee-length Roksanda Ilincic dress. Getty Images
On one of the first stops on Will and Kate's Canadian tour, the couple watched a rodeo demonstration in Calgary on July 7 2011. Getty Images
Kate almost had a wardrobe malfunction when the pair arrived in Calgary that day. The skirt of her canary yellow Jenny Packham dress kept blowing up in the wind. Getty Images
Kate kept it casual in Yellowknife, Canada, on July 6 2011. Getty Images
Will and Kate, wearing a purple Issa dress, celebrate Canada Day in Ottawa. Getty Images
Stepping out in another Jenny Packham gown, Kate attends a gala at London's Kensington Palace with William on June 9 2011. Getty Images
Camilla, duchess of Cornwall, and Kate attend the Order of the Garter Service on June 13 2011. Kate wore a silver coat and fascinator. Getty Images
Last but not least is Kate's stunning wedding dress. She wore the gown by Alexander McQueen designer Sarah Burton when she married William on April 29, 2011. Getty Images
Kate, dressed in a red coat, and her then-fiancé visited the University of St. Andrews in Fife, Scotland, in February 2011. The couple met while studying at the university. Getty Images
Will and Kate posed for photographs after announcing their engagement in November 2010. Getty Images
