Piers Morgan has launched another blistering attack on Meghan Markle in a new documentary, branding the Duchess a 'mini royal Kardashian'.

The Good Morning Britain presenter appeared on 'Harry & Meghan: The Royals In Crisis' and continued his case the American has been bad news for the Firm.

A frequent critic of the former Suits actress, Piers did not hold back on his thoughts on the Duchess of Sussex and her decision with Prince Harry to relocate to Canada and North America.

He even went on to declare that the move will signal the "beginning of the end of the monarchy."

Speaking to the camera in a series of clips throughout the documentary, Piers began by saying: "If Meghan Markle thinks she is going to emerge from this as some kind of Princess Diana figure, she needs to think again."

He continued to say that she will be on a par with the stars of Keeping Up With The Kardashians.

Piers said: "She’s going to end up like a mini royal Kim Kardashian with all the ignominy that goes with that title.

"Already you are seeing a big backlash in Britain and the rest of the world really sees what it is, which is a power grab by two ego-mad, self-obsessed, virtue signalling ‘progressive’ young people who basically stamped their feet and the Queen rolled over."

In the TMZ documentary, Piers went on to declare that Meghan and Harry want to "have their cake and eat it."

He continued: "This is all about making Meghan the big star and it doesn’t matter what it costs.

"The Queen has given them license to go off and have their cake and eat it and I think she is going to eat more cake than we’ve seen since Marie Antoinette."

Piers finished by saying: "If you end up having renegade royals running around the world like global celebrities, if you allow them to do that, to ruthlessly commercially cash-in on their royal fame, that is the beginning of the end of the monarchy.

"That’s why I am stunned that the Queen has allowed them to do that."

American talk show host Dr Phil refuted the claims of Piers and said that Meghan had a lot of qualities of Princess Diana.

He said: "Let’s look at who Harry’s mother was and who Harry married.

"You know, his mother was sassy, beautiful, independent and Harry comes in and marries this woman that is sassy, beautiful and independent.

"She was not going to be a member of the flock and just follow on like a sheep."