But what exactly is an "HRH" title, and why are three little letters so significant? What is an "HRH" title? The letters stand for His or Her Royal Highness, a style used to denote senior members of the royal family. Prince Harry is still Prince Harry, and the pair are still the Duke and Duchess of Sussex. Today, children and grandchildren of the monarch traditionally get the HRH title -- though it was historically withheld from granddaughters.

Source: CNN January 20, 2020 13:41 UTC