Trooping the Colour has to be the most over-the-top birthday celebration, commemorating King Charles’s birthday with a military parade, carriage procession, flypast, and more. While his actual date of birth is in November, the annual parade takes place in June in the hopes of better weather. The birthday boy–that is, King Charles III—wore his usual military finery for the event, but a sweet little accessory was peeking out, and we think Princess Charlotte might have something to do with it.