The Duchess of Cambridge has said she is "absolutely thrilled" at the "exciting news" of Prince Harry and Meghan Markle's engagement.
The Prince and his American fiancee announced on Monday that they are to wed after a 16-month romance. They will tie the knot at Windsor Castle's St George's Chapel in May, Kensington Palace said.
On a visit to a London museum, the Duchess, who is pregnant with her third child, said: "William and I are absolutely thrilled.
"It's such exciting news. It's a really happy time for any couple and we wish them all the best and hope they enjoy this happy moment."
The Duchess of Cornwall said "America's loss is our gain".
"We are all absolutely delighted," Camilla said, speaking during a visit with the Prince of Wales to Stoke-on-Trent.
"As you can see, they are so happy."
The Palace did not give a precise date.
May was seen as a likely option given the number of Royal events next year: in April the Duchess is expected to give birth to her third child and the Queen is occupied with the Commonwealth Heads of Government Meeting.
William and Kate married at Westminster Abbey.
St George's Chapel at Windsor Castle is a smaller venue – and therefore it was seen as appropriate for Prince Harry, the fifth-in-line to the throne.