Princess Charlotte was caught on camera reminding Prince George of royal protocol as the pair attended their great-grandmother's funeral on Monday.
The youngest royals to attend the service for Queen Elizabeth II, the nine and seven-year-old were seen accompanied by their parents, the Prince and Princess of Wales, as the family paid their respects.
While the children's younger brother, Prince Louis, was left at home, the pair had walked beside Prince William and Kate as they headed into Westminster Abbey.