Kate Middleton stunned fans as she paraded down The Mall in a chic Alexander McQueen dress to celebrate Trooping the Colour.

Eagle-eyed royal fans may have also noticed that the Duchess of Cambridge made a sweet tribute to her late mother-in-law, Princess Diana.

The royal mum-of-three, who sat alongside Camilla, Duchess of Cornwall, in the carriage procession, could be seen wearing a pair of earrings that once belonged to the Princess of Wales, paired with William’s mothers sapphire engagement ring.

The precious earrings were a favourite of Princess Diana’s as they perfectly matched her engagement ring and could be seen being worn by her daughter-in-law today.

The double drop pair were originally given to Diana as a wedding gift as part of a suite of jewels from Crown Prince Fahd of Saudi Arabia.

In a special “letter of wishes” included in her will, Princess Diana wrote: “I would like to allocate all my jewellery to the share to be held by my sons, so that their wives may, in due course, have it or use it. I leave the exact division of the jewellery to your discretion.”

Applause erupted as thousands of royal fans swamped the Union Jack-lined Mall on Thursday for the Trooping the Colour in honour of Her Majesty’s 70 years of service.

Kate was joined in a carriage by Prince George, Prince Louis, Princess Charlotte and Camilla as the jubilant crowd cheered. Fans caught a glimpse of the royals who appeared on the Buckingham Palace balcony alongside the Queen.

Prince Andrew, Prince Harry and Meghan Markle will be noticeably absent from the display after Her Majesty limited the line-up to working royals only.

The party will be joined by Beatrice and Eugenie and Zara Tindall at the Major General’s Office overlooking Horseguards Parade.

Images: Getty Images

This article first appeared on OverSixty.