Ten years before the passing of Queen Elizabeth II, Kate Middleton was forewarned by someone with ties to Princess Diana.

Kate was cautioned by Mohamed Al-Fayed, whose son Dodi Al-Fayed died beside Princess Diana in a Paris tunnel in August 1997, not to wed Prince William.

The businessman admitted to telling the Duchess of Cambridge that while she had every right to adore King Charles III's oldest son, the British royal family would ruin her in an interview with Radar.

According to reports, he emphasized his position and advised her, "Don't get married. His family will ruin you."

Mohamed stated, "Kate, like Diana, has no clue the price you have to pay when you exchange vows with a Windsor," prior to Kate's 2011 wedding to the future Prince of Wales.

The future king, however, is praised by the father, who claims that he seen Prince William develop into a "great guy" and encouraged England to be happy that he would become king.

Prince William, he claimed, wasn't the issue in Mohamed's view.

I can totally see Kate falling in love with him since he has his mother's charm, but the cost will be too high.

The Duke of Cambridge is wearing a "albatross" around his neck, continued Mohamed, and his last name is Windsor.

Because she was so well-liked by the people, "the Windsors will dread her in the way they eventually hated Diana, and they will do their hardest to ruin her."

READ ALSO: Prince Harry, Meghan Markle Glory Days In America Could Be Over If They Continue To Do THIS

King Charles III, Queen Consort Camilla 'Poisonous'

King Charles III and Queen Consort Camilla were even referred to by Mohamed Al-Fayed as "poisonous in-laws," and he emphasized that expecting Kate Middleton to please the family "may prove too much" for her to handle.

The 93-year-old company also said that, if Princess Diana were still alive today, she would have been the first to advise Kate against getting hitched to a member of the royal family.

"When it comes to the Windsor family, normal norms no longer apply. William will want to keep Kate safe," but added that might not be a smart idea.

Prince Philip's 'Tactics'

The late Duke of Edinburgh Prince Philip and the Queen Consort were also criticized by Mohamed, who said that their strategy was to let their "henchmen" know every single detail so they could launch a smear campaign against the woman.

If everything else fails, it is said that Prince Philip will allegedly inject the family with poison, forcing them to turn against Kate even though she is not to blame.

Additionally, he asserted that Camilla would despise Kate if she learned that the public preferred the Duchess to her.

READ MORE: King Charles III Gains Criticisms For Being 'Fussy' In Viral 'Pen' Video But Fans Rush To His Defense