Kate Middleton and Prince William are purportedly intrigued about a conspiracy theory surrounding Princess Diana's death.

There have been rumors that Princess Diana's death has allegedly been planned, and a conspiracy theory claimed that the "People's Princess" was purportedly pregnant when she was killed in an allegedly staged accident.

According to Globe Magazine, Kate Middleton and Prince William are allegedly trying to uncover the truth behind what allegedly seems to be a "questionable" death.

A Russian author, Gennady Sokolov, wrote a book about the alleged possibility that Princess Diana's death was planned. The author reportedly cited inconsistencies surrounding Lady Di's death, suggesting that there was a cover up.

"Diana became a real threat to the Windsors," Sokolov wrote, as quoted by Celeb Dirty Laundry.

"There was a strong rumor she was pregnant and I think that it was not a coincidence that her body was mummified an hour before it was sent to London. After that it would be impossible to identify if she was pregnant."

Allegedly, this conspiracy about Princess Diana's death has caught the attention of Prince William. The future king purportedly doesn't trust anyone else about circumstances of his mother's accident, except for Kate Middleton and his brother, Prince Harry.

"This alleged pregnancy is suspected to be the reason that Diana's tissue samples went missing and why she may have been targeted by Prince Charles or someone else in the monarchy," CDL's report said.

"The idea of Princess Diana being pregnant by Muslim playboy Dodi Fayed was rumored to be quite unacceptable to the monarchy and a threat to its existence," it added.

According to the report, Prince William and Kate Middleton are allegedly pushing for the reinvestigation of Princess Diana's death in order to prove or disprove the conspiracy theory that she was pregnant when she met an accident.