The former Made In Chelsea star, 31, showed off her darker locks as she arrived at Ascot racecourse in a gold vintage dress, which was inspired by Disney's Beauty And The Beast.
Catherine, 44, was a vision as she enjoyed the festivities on the second day of the prestigious British racing event after pulling out of last year's festival at the last minute.
The Middleton matriarch appeared to be ageing backwards as she repurposed the blush pink Catherine Walker ensemble for a day out at the races in Berkshire.
Zara Tindall's husband, 47, earned praise on social media after fans noticed how Mike respectfully tipped his hat to Queen Camilla in the Royal Enclosure at the Berkshire racecourse yesterday.