VIDEO : Harry And Markle's Royal Photo

Prince Harry and Meghan Markle linked arms in one of Prince Louis' official christening portraits. It's an affectionate pose the couple has assumed in photos many times before. Royal etiquette expert Myka Meier tells INSIDER that there is no official protocol that prohibits couples from holding hands or linking arms in christening portraits. While it may be "atypical" for Harry and Markle to hold hands during a royal engagement, Meier tells People, it's "a refreshingly modern approach to their new role both as a couple and as representatives of the royal family."