Pippa Middleton has been tipped to be “appointed” in a key role during Prince William and Kate’s reign, according to a royal commentator. The Princess of Wales “will have to rethink” a major part of her role once she becomes Queen. Pippa, 40, could be considered for the role of her sister’s lady-in-waiting once she becomes Queen, according to a royal commentator. Kate will become Queen in the future once her husband, Prince William ascends to the throne. She may need to reconsider a major part of her role as a senior member of the Firm. Royal historian Kate Williams told the latest episode of …