Princess Diana reportedly made an innocent mistake that jeopardized her marriage to Prince Charles.

On March 15, 1981, Princess Diana arrived at her post-engagement event in her black taffeta ball gown, which made her look young, pure, and innocent. According to Victoria Arbiter, a royal correspondent, Princess Diana’s beautiful image at that time made everyone want to take good care of her.

Speaking in “The Windsors” podcast, Arbiter also said that Princess Diana’s choice of the gown designed by David and Elizabeth Emanuel made her mark as a distinguished and grown-up member of the royal family. However, she also broke royal protocol with what she wore.

“Royals generally at that time only wore black if it was a funeral. Diana later revealed that she was heartbroken because she didn’t know,” Arbiter said.

In related news, Princess Diana also made headlines this week after it was revealed that her eldest son, Prince William, resented her and Prince Charles. Katie Nicholl, the author of “William and Harry,” said that Prince William resented the fact that he belonged to Prince Charles and Princess Diana’s family.

“The strains in the marriage had taken a toll on him. Nevertheless, the Queen was determined that Charles and Diana should give their marriage one final chance,” she said.

In 1991, Her Majesty advised Prince Charles and Princess Diana to wait six months before finally deciding on the fate of their relationship. But months later, Prince Andrew and Sarah Ferguson revealed that they were getting a divorce. Their decision influenced the Queen’s thinking about the Prince and Princess of Wales’ marriage.

The Queen realized that enough embarrassment has been caused in the royal family by Ferguson’s misconduct. This is why she eventually thought that getting a divorce was the right thing for Prince Charles and Princess Diana to do.

In 1992, they traveled to Korea on a royal tour, but the entire trip was a disaster. Instead of becoming much closer to each other, the couple realized that they couldn’t stand each other or be in each other’s company.

Princess Diana Princess Diana's marriage to Prince Charles was jeopardized even before it began. Pictured: Princess Diana arrives on October 4, 1990 for a charity gala at the Departmental Auditorium in Washington. Photo: Getty Images/Kevin Larkin/AFP