Prince Harry didn't speak with King Charles or Prince William at the coronation, but the king did acknowledge Archie's birthday. ET speaks with experts, from body language specialist Darren Standon to royal biographers and reporters Katie Nicholl and Omid Scobie, to get the inside scoop on Charles' big weekend. Getty Images royal photographer Chris Jackson provides insight into the family dynamics, too, as ET takes a deeper look at Prince William and Kate Middleton's children, George, Charlotte and Louis, and their involvement in the new royal order. Plus, fresh details about the royal fashions; how Kate paid tribute to the late Princess Diana, and never-before-revealed info about Queen Camila's coronation dress from the designer himself, Bruce Oldfield.