According to Lady Colin Campbell, Princess Anne deemed Meghan "unsuitable", thus kicking off the feud between the Duke of Sussex and his family.
The Mirror claims Lady Colin Campbell shared her thoughts in a 38-minute YouTube video which recently came to light, where she explained: "Princess Anne was the champion in terms of 'don't marry that girl, she's unsuitable.'
"'She is wrong for us, she is wrong for the country, she is wrong for the job'."
It comes after reports resurfaced that Princess Anne refused to attend Prince Harry's christening in 1984 with Daily Express reporter Ashley Walton writing at the time, Anne instead went game shooting with then-husband Mark Phillips as she was angry at being overlooked as godmother for the second time.
The report also noted that Prince Charles' decision to leave his sister off the list of six godparents also annoyed Prince Philip.
"There were rumours that Charles and his father were not on speaking terms as a result," the report read.
Sussexes bombshell interview nominated for an Emmy
This comes as Meghan and Harry's bombshell interview with Oprah Winfrey was nominated for an Emmy.
Oprah With Meghan And Harry was nominated for Outstanding Hosted Nonfiction Series or Special at the 73rd Annual Emmy Awards.
The special, which was the couple's first interview since leaving the royal family, was viewed by over 49.1 million people worldwide in March.
Never miss a thing. Sign up to Yahoo Lifestyle’s daily newsletter.
Or if you have a story idea, email us at email@example.com.