Princess Charlotte was captured mimicking Sophie, Countess of Wessex, as she paid her respects to the late Queen yesterday.
The seven-year-old joined her mother, the Princess of Wales, brother Prince George, the Queen Consort Camilla, aunt Meghan, Duchess of Sussex and great-aunt Sophie, Countess of Wessex outside Westminster Abbey following the funeral service.
Footage shows the young royal watching the Countess of Sussex as she dropped into a curtsy while the Queen's coffin passed them.
Charlotte then copies her aunt by giving her own curtsy, while Prince George stands alongside her and bows his head.
Viewers took to social media after spotting the sweet moment, with one writing: "Love how Charlotte looks up to Sophie and tries to curtsy, it's cute."
Another tweeted: "Charlotte taking the cue from Sophie. Then George taking the cue from Charlotte."
A third said: "Awww, even Princess Charlotte gave a proper curtsy."
And a fourth commented: "Such wonderful well behaved children. They know when to show respect and how to do it."
Sophie was also spotted placing a comforting hand on nine-year-old Prince George's shoulders as they joined the funeral procession.
The nine-year-old future king could be seen walking ahead of his sister as the Queen's coffin was carried by the military pallbearer party.
The siblings became the youngest royals to take part in a royal funeral procession as they took on the public-facing role on Monday.
It was unknown if George and Charlotte would walk in the procession in the chapel as their names did not feature in the order of service.
But they took their places for their second role of the day in the committal service, seemingly following a decision by their parents William and Kate.
In a change to the originally suggested formation, the Prince and Princess of Wales walked either side of their children, rather than in front of them, with Kate holding Charlotte’s hand.
It is understood the royal couple thought long and hard while having discussions with the pair before deciding they would attend.
Speaking about her children, The Princess of Wales shared how they are coping with the death of their beloved "Gan Gan" - a family nickname.
Chatting with Australia's Governor-General at a reception held for Commonwealth dignitaries ahead of the Queen's funeral, Kate explained George is beginning to understand the significance of his great-grandmother.
David Hurley recalled his conversation with Kate, saying she revealed her eldest son is "sort of now realising how important his great-grandmother was and what is going on".