Princess Diana holds Prince Harry as her older son Prince William
Princess Diana holds Prince Harry as her older son Prince William (L) looks out over the balcony of Buckingham Palace in London on June 11, 1988 after attending the Trooping the Colour ceremony, the Queen's birthday parade. Reuters/Stringer

Diana had a clever way to get her eldest son to behave. An old footage that has surfaced online sees how the Princess of Wales got a young Prince William to do what he’s told while she’s taking care of Prince Harry at the same time.

In the video, posted on Instagram by the dianaspxncer account, shows the young princes dressed in army uniforms. Diana is carrying a quiet Harry while William was running about. William then runs to a far side of the yard and refuses to run back to his mother when she called him.

“So when this soldier is slow to follow orders, his mother has her own tactic to bringing him into line,” the narrator says.

“All right, Harry will have all the fun then,” Diana is heard telling her young son. To which, William fervently yells, “No! No, no, no, no!” while running back to his mother.

Diana, pretending she’s not interested anymore, replies, “No, it’s all right,” waving William off while walking away with Harry in her arms.

It was ingenious parenting tactic, one that which many parents can attest works with young children. Commenters said it was a delight seeing a glimpse of how normal life was for the mother of two inside the palace walls.

It did not say when the footage was shot, but as William and Harry were about around 3 to 4 and 1 to 2 years old respectively, it could be taken in 1985 or 1986. The footage appears to be from a documentary.

Charles, Prince of Wales (L) Prince William, Princess Diana and Prince Harry
FILE PHOTO OF MAY 7, 1995 - Charles, Prince of Wales (L) Prince William, Princess Diana and Prince Harry attend the Heads of State ceremony in Hyde Park to commemorate the 50th Anniversary of VE Day, May 7, 1995. Reuters/Dylan Martinez

Diana’s smart parenting method seems to have rubbed off on William, who now has three kids of his own with wife Kate Middleton. According to Express, Diana got down on her sons’ level to talk to them, and she was the first member of the Royal family to do so.

“The Royal family used to say that everyone had to be deferential to them, but Diana believe, ‘If you’re speaking to a very young child or a sick person, get yourself on their level,’” Ingrid Seward, the editor of Majesty magazine, told the publication.

William, as well as Kate, appears to follow the same belief as well. They have been seen following the same advice in a number of occasions with their children.

Britain's Prince William and Catherine, Duchess of Cambridge, look on as Prince George plays with a bubble gun and Princess Charlotte
Britain's Prince William and Catherine, Duchess of Cambridge, look on as Prince George plays with a bubble gun and Princess Charlotte plays with balloons at a children's party at Government House in Victoria, British Columbia, Canada, September 29, 2016. Reuters/Chris Wattie
Britain's Prince William, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte
Britain's Prince William, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte arrive at the Victoria International Airport for the start of their eight day royal tour to Canada in Victoria, British Columbia, Canada, September 24, 2016. Reuters/Kevin Light
Prince George is told off for running away from him by Prince William
Prince George is told off for running away from him by Prince William during a visit to the Royal international air tattoo at RAF Fairford, Britain July 8, 2016. Reuters/Richard Pohle/Poo

With three kids aged 5 and under, William surely has his hands full at home. But according to People, he wouldn’t have it any other way. A source told the paper that William also credited Prince Charles for his outlook as a father.

“[William’ is a very good father,” a family friend said. “As his own father has been. [Charles] has been a very good father to those boys and they’re very, very fond of him.”

Britain's Prince Charles (C) and his sons Prince William (L) and Prince Harry ski down Whistler Mountain, during their spring break vacation March 26 at Whistler.
Britain's Prince Charles (C) and his sons Prince William (L) and Prince Harry ski down Whistler Mountain, during their spring break vacation March 26 at Whistler. Reuters/Str Old