The Duchess of Sussex's estranged father Thomas Markle criticized Prince Harry's upcoming memoir.
Appearing on Good Morning Britain, Thomas claimed Harry wrote the book for money despite the duke's publisher previously saying he will donate proceeds to charity.
"Harry's coming out with a book, and that can't be anything but cruel and to insult his grandmother, the Queen. It's a ridiculous idea, and it's just something for money," Thomas said.
"That's all they're doing. Everything they're doing is for money."
The Duke of Sussex's memoir will be published by Penguin Random House in late 2022, Insider reports. The publisher did not say how much of the proceeds would be donated or which charity they would be donated to.
Harry said in a statement at the time that the book is being written "not as the prince I was born but as the man I have become."
"I've worn many hats over the years, both literally and figuratively, and my hope is that in telling my story - the highs and lows, the mistakes, the lessons learned - I can help show that no matter where we come from, we have more in common than we think," he said.
In another clip from the interview, Thomas said that his daughter Meghan has "pretty much disowned both sides of her family" and appeared to blame Harry.
He went on: "I've made it quite clear that until I hear from her, until she does speak to me, that I will continue to do this. She'd never been that way before, and once she hooked up with Harry, she changed.
"I will do a show at least a month, if I can get it through, and eventually sooner or later she'll start talking to me. This is way too childish, this is kind of silly, it's time to talk with each other, we're family.
"The kids are going to grow up without knowing that they have two families. This is more than just me and my daughter now, this is me and my daughter, her husband and two babies involved now, so it's time to do something. It's time to talk."
Asked if he has any communication with his ex-wife Doria Ragland, Thomas said: "I've tried a few times, I don't even know where her mother is at this point, I don't think she's in Los Angeles, or with Meghan and Harry. I don't know where she's at. I have tried to contact her."