Meghan Markle's father has labelled her "attacks" on Queen Elizabeth II "unforgivable" and "embarrassing".
In a wide-ranging interview with GB News host Dan Wootton - the former executive editor of The Sun - Thomas Markle lashed out at the Duke and Duchess of Sussex's behaviour in recent months.
He was asked about reports that Meghan and Prince Harry were not invited to Barack Obama's recent 60th birthday party, reportedly attended by a large number of A-List celebrities.
Biographer Angela Levin reports Meghan "desperately" wanted to be among the special guests, but the Obamas are likely wanting to distance themselves from the Duke and Duchess - who they have previously been close with - in the wake of their Oprah Winfrey interview. The Obamas are also close with Prince William and Kate Middleton.
"I'm sure that if they say we can only deal with one brother and his wife - you cannot have both because they are so far apart now - they will go towards William," Levin writes. "The Obamas clearly always regarded Harry highly, but I am sure they can see through Meghan."
Thomas told Wootton that the Obamas had made the right decision.
"Both Meghan and Harry are attacking the Royal Family… for God's sake, attacking a 95-year-old grandmother and great-grandmother. That is unforgivable...It is embarrassing that they are doing this."
He also said it was "embarrassing" for the pair to have once told him not to speak to the press, but then to go on and do a lengthy interview with Winfrey. He said Harry's comments about his mental health were a "joke".
"You don't go on the TV and talk for three hours to get rid of your mental illness. You talk to a psychiatrist quietly in a room somewhere and you work out your problems, but you don't turn it into a TV show."
Thomas also revealed he sent his daughter a bouquet of red roses for her recent 40th birthday, with two yellow roses in the middle for his grandchildren he is yet to meet.
"I wished her a happy birthday and brighter days ahead but I've not heard back," he told Wootton.
Ever since they stepped down from their royal roles in early 2020, the pair have been frequently criticised for what commentators say are attempts to undermine the royal family.
Prince Harry's decision to release a memoir as Queen Elizabeth celebrates her jubilee celebrations next year was seen as "deeply disrespectful" to the monarch, while the pair saying the Commonwealth needs to "acknowledge past wrongs" was also smacked down by some.
Meghan released a comedic video with actress Melissa McCarthy last week where they pretend to have tea with each other. Levin said it appeared Meghan appeared to be "mocking the Queen".