Prince Harry and Meghan Markle's upcoming trip to Australia may be missing two very important people close to the couple - and one British royals expert believes there's a strategic reason behind their absence. The Duke and Duchess of Sussex are set to travel Down Under in mid-April for what their spokesperson described as a series of "private, business and philanthropic engagements." But their children - 6-year-old Prince Archie and 4-year-old Princess Lilibet - are not expected to join them.