In an interview with Nigel Farage, the former US president also said he thinks Meghan’s husband Prince Harry has been “used horribly”.
Mr Trump spoke about a number of subjects during the interview which took place in Florida on Monday and will be broadcast on GB News.
Speaking about Meghan, Mr Trump said: “I’m not a fan of hers. I wasn’t from day one. I think Harry has been used horribly and I think someday he will regret it.”
According to GB News, he added: “I think Harry’s been used and been used terribly.
“I think it’s ruined his relationship with his family, and it hurts the Queen.”
In response to comments from Mr Farage about Meghan using Duchess of Sussex headed writing paper to lobby members of Congress, Mr Trump said: “She is trying do things that I think are very inappropriate.”
GB News said he told Mr Farage: “I think she’s very disrespectful to the royal family and most importantly to the Queen.”
During the interview, Mr Trump described Queen Elizabeth (95) as “a great woman, such a great person, a historic person”.
It is not the first time Mr Trump has spoken about Britain’s royal family.
During his state visit to the UK in summer 2019, Mr Trump, whose late mother Mary Anne was born in Scotland, praised the royals saying: “The Queen and the entire royal family have been fantastic. The relationship with the United Kingdom is very strong.”
He has been critical of Meghan and Harry on a number of occasions. Mr Trump said of the Duchess of Sussex in The Sun in 2019: “I didn’t know that she was nasty.”
When the couple urged people to vote in the 2020 election after having relocated to the US from Britain, Mr Trump told reporters: “I’m not a fan of hers and I would say this, and she probably has heard that.
“But I wish a lot of luck to Harry, cause he’s going to need it.”
GB News said the interview features Mr Trump talking about Boris Johnson, the presidential election, events at the US Capitol on January 6, Black Lives Matter, the migrant crisis in the US and UK, Antifa, and the question of whether he will run for office again.
Farage, The Trump Interview
airs at 7pm this evening on GB News
Meanwhile, a lawyer for Mr Trump yesterday asked a US appeals court to keep records about his conversations and actions before and during the January 6 Capitol riot by a mob of his supporters away from congressional investigators.
The US Court of Appeals for the District of Columbia Circuit heard oral arguments in Mr Trump’s appeal of a judge’s decision that the White House records should be released to a congressional committee.
At the start of the hearing, which is ongoing, the three judges on the panel questioned Trump lawyer Jesse Binnall over whether courts have jurisdiction to hear the former president’s claims.
“All three branches of government have acknowledged there is a right of former presidents to challenge the designation and release of presidential records,” Mr Binnall responded.
The House of Representatives select committee investigating the riot has asked the National Archives
to produce visitor logs, phone records and written communications between his advisers.
The panel has said it needs the records to understand any role Mr Trump may have played in fomenting the violence.