today, harry's sister-in-law kate, the duchess of cambridge. >> 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. >> reporter: and camilla, prince charles' wife. >> america's loss is our gain. >> reporter: and the public welcoming their soon-to-be american princess. >> it's good to see the royal family moving with the times at last. >> it's time he got married and settled down. >> reporter: during that interview, they just seemed so in love. the tabloids even turning to a lip reader to see just what the couple is whispering during those off-mike moments. harry and meghan laughing. interrupting each other. "she wants me to say something," harry says here. "oh, sorry," meghan apologizes, and gives him a look that slays. >> terry, we're learning markle will become a british citizen. the question, though -- does that mean she gives up her u.s. citizenship? >> reporter: there's no law in the uk that would require it. a family spokesman says it's too soon to say. but as an american citizen,