Prince Harry and his brother, Prince William, got some face time in over the weekend, and it seems we have Kate Middleton to thank for it. As royal expert Katie Nicholl tells ET, Kate has served as a «peacemaker» between the royal brothers. «They were very tense as they walked into that chapel,» Nicholl says of William and Harry, who reunited at the funeral of their grandfather, Prince Philip, at Windsor Castle on Saturday.