LONDON — It’s been a 12 months of many firsts for the British royal family.

King Charles III led his first Garter Day service at St George’s Chapel in Windsor on Monday, June 19, surrounded by his family, including Queen Camilla, the Prince and Princess of Wales, and the Duke and Duchess of Edinburgh.

The senior members of the royal family walked in procession to the chapel.

Kate Middleton wore a bespoke white Alessandra Wealthy dress with brown polka dots. She matched the dress with two-tone pumps from the identical London-based brand and added a black Philip Treacy hat with polka dot detailing. The princess also wore her late mother-in-law Princess Diana’s pearl earrings.

Your complete ensemble nodded to Princess Diana and to the outfit that Audrey Hepburn’s Eliza Doolittle character wore to Ascot in “My Fair Lady.” This 12 months, Ascot takes place from June. 20 to 24, and members of the royal family will likely be in attendance.

In 1988, Princess Diana wore a polka dot Victor Edelstien dress to Royal Ascot with two-tone pumps and a large white brim hat with black polka dots.

Middleton’s tilted hat imitated Hepburn’s one within the 1964 musical comedy based on George Bernard Shaw’s “Pygmalion.”

On Saturday, the Princess of Wales made one other nod to her late mother-in-law at Trooping the Color.

Middleton wore a custom emerald green Andrew Gn coat dress with a satin trim to represent her role as Colonel of the Irish Guards, with an identical hat by Philip Treacy. 

The dress featured blue jeweled embellishments that matched her sapphire engagement ring and earrings that had once belonged to Princess Diana.

The princess added a Cartier shamrock brooch to her green number.

The Gn dress resembled one which Diana wore in 1988 for Trooping the Color. Diana’s green dress with a white trim was designed by Catherine Walker. Diana paired the dress with an identical hat.