Meanwhile, her husband. Prince William, was celebrating the 75th anniversary of D-Day at the National Memorial Arboretum.
The Duchess of Cambridge wowed in a beautiful white gown by Alexander McQueen.
ET is breaking down our top contenders for the role of Archie's godmother and godfather.
A source tells ET the Duchess of Sussex will not meet with the President during his trip to the UK next week.
The darling 4-year-old royal will be attending Thomas's Battersea with her older brother.
The day before, the Duchess of Cambridge gave the queen a tour of her garden at the Chelsea Flower Show.
Kate Middleton spent quality time with Queen Elizabeth and her husband, Prince William, on Monday.
George wore them during an Australian trip in 2016!
The mother of three was as elegant as ever in her casual clothing.
The royal siblings helped their mom gather moss, leaves and twigs for the RHS Back to Nature Garden.
Also, check out the treehouse the duchess helped build!
Some of the biggest headlines about the Duke and Duchess of Sussex continue to be focused on their family dynamics.
ET is counting down Meghan and Harry's cutest moments since their royal wedding on May 19, 2018.
This look is still in style, 34 years later.
