She is six months pregnant and still managing to stay away from traditional maternity wear
The 31-year-old, who honoured the high achievements of hundreds of Scouts at Windsor Castle yesterday wore a mint cotton Mulberry coat that is currently on sale for £1,750 (€2041).
The Duchess teamed the designer jacket with her favourite nude LK Bennett heels and the tan-coloured fascinator by Whiteley that she has sported on several occasions.
Many women at the same stage of pregnancy have long since ditched their normal clothes in favour of more comfortable maternity styles.
However, since announcing that she was expecting a baby in July, the stylish Duchess has been pictured in a string of high street and designer clothes.
Despite choosing a standard sized jacket, she looked distinctly pregnant, her relatively small baby bump clearly visible.
It was unclear whether her jacket had been tailored to accommodate her changing shape.