This is What's Trending Today...Another royal baby is on the way.Britain's Prince Harry and his American wifeMeghan Markle are expecting a child.Kensington Palace tweeted the announcement Monday morning.It read: "Their Royal Highnesses The Duke and Duchess of Sussexare very pleased to announce that The Duchess of Sussexis expecting a baby in the Spring of 2019."Markle had been wearing looser clothing for several weeks.Then, on Friday, she wore a large coat to a royal wedding.Media reports quickly spread that she was possiblytrying to hide signs of a pregnancy.The couple has been married almost five months.Their wedding ceremony last May in Windsor, Englandwas a hugely popular televised event.The Duke and Dutchess are currently in Australiaat the start of a 16-day trip that will also include visitsto Fiji, Tonga and New Zealand.The pregnancy news came out shortly after they landed in Sydney.It set off a series of congratulatory posts on social media sites.Many people are also guessing the sex of the baby,making lists of possible namesand discussing the possibilities for its future in public service.Some guesses are funny. American journalist Greg Pollowitzposted that the child will be an American citizenand might run for president someday.He wrote, "Congratulations to Princess Meghan and Harry,and to the #RoyalBaby who will one day rule the Great American Empire."Another Twitter user posted that the baby will help,' Make America Great (Britain) Again."And that's What's Trending Today.