According to a professional cameraman, who is said to have worked closely with Meghan on a shoot, she would bring a large entourage with her on set and laid down a strict set of rules – including not to film her feet.
The Suits actress is also said to have insisted on having expensive champagne used during the shoot and demanded she be given full approval over all the footage.
"She was very high maintenance and rude," the videographer reportedly told the Daily Mail. "She was difficult and demanding."
The videographer, who wished to remain anonymous because he still works in the industry, said: "People told me, 'get ready because she is a lot'. They used to call her 'the princess.'"
The videographer said the shoot took place before it emerged that TV actress Meghan was dating Prince Harry.
He said she came with her own team and a long list of demands and put pressure on from the start that she was going to have to approve everything.
He added that she was really easy to shoot and knew her job inside out, but when the cameras stop rolling "she's not the most friendly person."
"There were all these demands – you have to get a specific type of flower, you can't film her while she is getting her make-up on, you have to get a certain brand of champagne for the shoot.
He added that you have to ask permission to shoot anything and the team felt like they were walking on eggshells.
They were also reportedly told as a rule that the videographer's team was not to shoot Meghan's feet.
"One of my team [members] is the nicest guy and he was traumatised by the end of it because she was so mean," the videographer said.
"He told me that at a certain point he started to shoot her feet, just taking some b-roll [supplemental footage] and I don't remember if they had told me in advance or not, but I understand she hates her feet.
"When he did that, they all looked at him like 'what the hell are you doing?' and said, 'you're done for today'.
After editing the video he was warned there was a chance Meghan could reject the whole thing - but she approved the work with no issues.
It comes as Meghan was branded “Duchess of Difficult” and “Di 2” by Palace staff just weeks after her arrival in an explosive new royal biography has claimed.
Daily Star Online reported how the biography will reveal the “real reason” Kate Middleton and Meghan’s feud apparently started – pointing to a “shouting” Meghan leaving Kate “horrified”.
But it has emerged the book – called “Kensington Palace: An Intimate Memoir From Queen Mary To Meghan Markle” – will also delve into the staff’s feelings about Meghan.
The writer – Tom Quinn – will speak to Palace staff to gauge an idea of life at Kensington while Meghan and Harry – who now live in Los Angeles after quitting the Royal Family – lived there.
He writes in the book, which has been serialised by the Daily Mail, that one former servant told him of their struggles with Meghan’s ways and unconventional background.