Princess Diana broke with — at the time — royal tradition and had William at the hospital instead of at home.They also posed on the steps of the hospital when their other two children were born.Prince Charles and Diana posed with a 6-month-old William at Kensington Palace.Middleton and William kept him entertained on royal engagements.William was photographed in Kensington Palace at 6 months old in 1982.He's since become more accustomed to cameras.He walked hand-in-hand with royal nanny Barbara Barnes.The prince wore the red and white ensemble to his sister's christening in 2015.William shook the hand of Frederika Blair-Turner, the headmistress of Wetherby School, on his first day in 1989.William reportedly works out with the other moms at Prince George's school after drop-off.While vacationing in Majorca, Spain, in 1987, William lounged on the steps of the Spanish royal palace.He's already perfected a world-weary glare.Prince Harry stole the show.Prince George joined the rest of the royal family on the balcony of Buckingham Palace in 2019.The royal couple brought all three kids to a performance at London's Palladium Theatre in honor of first responders and key workers for their work during the pandemic.George matched his father in a dark navy suit with a red-and-blue striped tie. George stood in between William and Middleton, who donned a red blazer to the sporting event.