Kate Middleton is enjoying the London 2012 Olympics and the Duchess of Cambridge has kept fans and fashionistas on their toes, as they try and predict her changing style statements. The Duchess' most recent appearance, at the track cycling events in the Velodrome, saw her "sporty" self to the fore.

Kate wore a white polo Adidas T-shirt, with the Olympic logo printed on the front, and teamed the t-shirt with a pair of black jeans and a sleek brown leather belt. To complete the ensemble, Kate opted out of her trademark glossy blow-dry hairdo and made a pony tail with her tresses parted sideways to the right. A pair of pearl studs completed her sporty look. She was accompanied to the event by Princes William and Harry and the trio clearly enjoyed themselves, cheering on the athletes, clapping and laughing.

The Duchess was also spotted later in the day at Wimbledon, for the men's singles quarter final between Great Britain's Andy Murray and Spain's Nicolas Almagro, and, as we explained earlier, she surprised fashion onlookers. Kate appeared in the same dress and style she wore to an exhibition in London, at the National Portrait Gallery, held before the Olympics started - an azure blue Stella McCartney crepe dress.

Finally, Kate has also been seen wearing a white and red Adidas sports jacket - at the jumping final for individual eventing, at Greenwich Park, on 31 July. She was accompanied by a number of members of the royal family, including William, Harry and the Princesses Beatrice and Eugenie. She was also seen cheering the Queen's granddaughter, Zara Phillips, during the equestrian competitons, in an equally sport but more equestrian-specific attire, complete with Team GB badges pinned to her blazer.

Check out photographs of the different Olympic styles of Catherine, the Duchess of Cambridge, from the sporty to the royal, at the London 2012 Olympic Games