Kate Middleton and Queen Elizabeth II bond again for the second time this week.

On Tuesday, the Duke and Duchess of Cambridge joined Queen Elizabeth II for the Royal Garden Party at Buckingham Palace. The two female royals even stepped out in color-coordinated outfits for the event, Entertainment Tonight reported.

Middleton donned a light pink coat dress by Alexander McQueen with matching Juliette Botterill fascinator and blush heels. On the other hand, Her Majesty wore a baby blue coat with matching hat designed with flowers by Rachel Trevor Morgan, a floral dress, and her signature, white gloves.

The Queen accessorized with a multi-strand pearl necklace and brooch. On the other hand, Middleton paid tribute to Princess Diana by wearing the late Princess of Wales’ pearl drop earrings. The royal mom of three finished off her outfit with nude suede pumps by Gianvito Rossi and a clutch by Loeffler Randall.

The stunning earrings from Princess Diana’s collection were from Collingwood jewellers. The People’s Princess wore it the first time a month before she married Prince Charles. On the other hand, the Duchess of Cambridge was first spotted using it in 2017 for a Spanish state banquet, Hello! reported.

Middleton regularly pays subtle homage to Princess Diana on her official outings. For instance, every Remembrance Day she always wears a pair of pearl earrings. Princess Diana did the same when she was still alive.

Meanwhile, a day before the garden party at Buckingham Palace, Queen Elizabeth II, Prince William and Middleton gathered together at Chelsea Flower Show. The Duke and Duchess of Cambridge were caught on camera approaching the Queen and kissing her on the cheek to welcome her to the event. Middleton performed a quick and perfect curtsy after she kissed Her Majesty. The couple toured Queen Elizabeth II around the garden which Middleton designed.

In related news, Middleton didn’t break the rules when she took Princess Charlotte and Prince Louis at her garden at the Chelsea Flower Show. It’s true that children below 5 years old are prohibited in the venue, however, children of all ages are welcome to visit Middleton’s woodland wilderness garden.

Queen Elizabeth II and Kate Middleton Kate Middleton reportedly rejected an invitation from Queen Elizabeth II to represent Prince William at Royal Ascot in 2008. Pictured: Middleton and Queen Elizabeth II during a Diamond Jubilee visit to Nottingham on June 13, 2012 in England.  Photo: Getty Images/Phil Noble