The Duchess' locks through the years.
Before she was the Duchess of Cambridge, she was Kate Middleton, Prince William's girlfriend. Here, she showcases a shorter cut with bangs as she attends a 2006 store opening in London.
Kate opts for a sleek and shiny look as her engagement to Prince William is announced at St. James's Palace, central London, on November 16, 2010.
Kate's ponytail blows in the wind as the newly-engaged royal couple attends a Naming Ceremony and Service of Dedication for the Royal National Lifeboat Institution's (RNLI) new Atlantic 85 Lifeboat in Trearddur Bay in north Wales on February 24, 2011.
Kate tops her demi-chignon with a diamond tiara loaned to her by the Queen for her wedding at Westminster Abbey in London on April 29, 2011.
Kate keeps her hair out of her face while she's watching the Epsom Derby at Epsom Racecourse in southern England on June 4, 2011.
Kate runs a hand through her famous locks after a visit to the Rose Hill Primary School in Oxford, southern England, on February 21, 2012.
The Duchess wears her hair in a demi-chignon at a reception at the Imperial War Museum in London on April 26, 2012.
Kate wears a similar style as she listens to young people during a visit to the 'Expanding Horizons' Primary School Project on June 17, 2012, in Wrotham, southern England.
Kate opts for a straighter look at the 10th annual Absolute Return for Kids (ARK) gala dinner at Kensington Palace in London, June 9, 2011.
Kate opted for an elaborate updo for the 'Our Greatest Team Rises' event to celebrate TeamGB and ParalympicsGB at the Royal Albert Hall in central London on May 11, 2012.
The Duchess sports a more casual, beachy look as she listens to a village chief deliver a speech after her arrival in Marapa Island, Solomon Islands, September 17, 2012.
Kate with her most frequently-seen style as she arrives for a visit to a community garden project at Elswick Park in Newcastle, northern England, on October 10, 2012.
The Duchess debuts a new look on November 27, 2012, during a visit to the Natural History Museum in central London where she officially opened the new Treasures Gallery.