Her appearance marked the first time the 33-year-old Duchess of Cambridge has been seen in public since late July, when she attended the America's Cup World Series in England. It marked her first royal engagement since giving birth to Princess Charlotte, her and William's second child and first daughter, who is now 4 months old. There, she wore her hair in a ponytail.
On Sunday, she wore her long brown hair pinned back, with long bangs framing the sides of her face.
Kate looked lovely in a maroon dress coat and black turtleneck and was all smiles sitting in the front passenger seat as her husband, also 33, drove. The two did not bring Charlotte or their son Prince George, 2.
Kate usually wears her hair loose in public. She appeared to have gotten her hair cut into long layers back a couple of months ago, as seen by her appearance at the 2015 Wimbledon tennis championship.
Kate is set to soon resume her royal engagements. She is scheduled to attend the Anna Freud Centre, a charity that helps children with mental health problems and their families, and its school in London this week.