The late Prince Philip once weighed in on his grandson Prince William's relationship with Kate Middleton, according to a royal author. Find out more.

Prince William and Kate Middleton may have a simple response to Prince Harry and Meghan Markle’s return. A friend of William and Middleton told Daily Mail diary editor Richard Eden that they would continue to “ignore” the Sussexes.

Less than two years apart in age, this sister pair have stayed close even as one of them became a royal. See the best photos of Princess Kate and Pippa Middleton’s sister moments through the years

Author Christopher Andersen says Kate Middleton is the monarchy's most important asset, crediting her preternatural calm and Diana-like appeal. Simon Vigar also shares how Kate rose as a beloved royal.

USA TODAY understands. The letter clarified that there would be absolutely no change to their royal status, despite them moving back to Britain last month. While palace sources told the BBC the duke and duchess were made aware of the letter before it was made public,