The Queen, meanwhile, also reverted back to her royal wedding style, wearing a strikingly similar outfit to the one she wore to Prince Harry and Meghan's wedding in May. The event took place for the opening of Mersey Gateway Bridge, where the queen unveiled a plaque to mark the occasion.
They also attended a lunch at Chester Town Hall.
Luckily, the Queen and the Duchess got everything squared away.
Prince Harry explaining exactly how Trooping the Colour really works.
For the actual ceremony, watched by millions around the world, Markle, now called the Duchess of Sussex, wore a sculpted long-sleeved dress with a boat neck by Clare Waight Keller, the British designer of couture house Givenchy.
The foundation is in the process of changing its full name to "The Royal Foundation of the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex" to reflect the change.
Princess Kate accompanied Queen Elizabeth during her Diamond Jubilee tour for her first solo visit in March 2012, almost 10 months after her April 2011 marriage to Prince William.
Meghan paired her look with a small black clutch and black heels.
Royal expert Omid Scobie told Elle that the Palace stated up front there would be no honeymoon scoops: "Kensington Palace have said that the honeymoon is very much a private trip and they won't be releasing details to the media".