Meghan Markle’s estranged half-sister, Samantha Markle, wants Prince Harry to testify in her defamation case against the Duchess of Sussex.

According to court documents obtained by Fox News Digital on Monday, Samantha has demanded the Sussexes to take the stand after allegedly making "false" statements in their 2021 interview with Oprah Winfrey. The televised tell-all was viewed by nearly 50 million people globally.

In the paperwork filed on Friday, Samantha noted that she wants the couple to be deposed in separate interviews. The documents said that "to date, the Duchess has not agreed to schedule one single deposition."

In addition to the Sussexes, the 58-year-old has requested the depositions of her father Thomas Markle, former royal aide Jason Knauf, her daughter Ashleigh Hale and online security expert Christopher Bouzy.

MEGHAN MARKLE SUED BY HALF-SISTER OVER OPRAH WINFREY TELL-ALL INTERVIEW

Samantha Markle Meghan Markle

Samantha Markle (left) has been at odds with her famous half-sibling Meghan Markle (right) for several years. (Gilbert Carrasquillo/Getty Images|ANGELA WEISS/AFP via Getty Images|FOX)

In 2022, Samantha sued her famous sibling for allegedly making "false" statements in her interview with Winfrey, 69. She accused the former American actress of defamation "based on demonstrably false and malicious statements" made in the sit-down on March 7, 2021. Samantha alleged that the duchess’ "lies" were "designed to destroy [her] reputation" and have subjected her to "humiliation, shame and hatred on a worldwide scale."

Samantha wants the former "Suits" star to admit she lied about their relationship and upbringing to sell a "rags-to-royalty" narrative. She alleged that Markle lied about being an "only child," as well as the last time they saw each other. Samantha claimed that Markle falsely stated the elder sibling changed her last name to Markle after she began dating Harry, 38. The women share the same father, 78.

Markle became the Duchess of Sussex when she married the British prince in 2018.

"Defendant was not forced at the age of 13 to work in low-paying jobs to make ends meet; Defendant attended elite and expensive private schools and dance and acting classes in Los Angeles paid for by her Father; Mr. Markle also paid for all of Defendant's college education at Northwestern including tuition, rent and living expenses and even took out loans to cover the considerable cost," Samantha previously alleged.

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Prince Harry and Meghan Markle being interviewed by Oprah

Oprah Winfrey interviewed Prince Harry and Meghan Markle on March 7, 2021.  (Harpo Productions/Joe Pugliese via Getty Images)

She is seeking damages in excess of $75,000.

Markle’s attorney Michael Kump didn’t immediately respond to Fox News Digital’s request for comment. In 2022, he told Fox News Digital the lawsuit was "baseless."

"This baseless and absurd lawsuit is just a continuation of a pattern of disturbing behavior. We will give it the minimum attention necessary, which is all it deserves," Kump said at the time.

Much of the drama surrounding the Markle family dates back to 2018. Samantha and her brother, Thomas Markle Jr. revealed they were "baffled" when the royal couple allegedly snubbed them from the wedding guest list. In the days leading up to the wedding and following the nuptials, Samantha was vocal about her frustration with the duchess and her actions toward the family.

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Meghan Markle being interviewed by Oprah Winfrey

During her sit-down with Oprah Winfrey, Meghan Markle addressed the tension within her family. (Joe Pugliese/Harpo Productions via AP)

During her sit-down with Winfrey, Markle addressed the tension within her family. At the time, it was reported that Samantha was writing a memoir titled "The Diary of Princess Pushy’s Sister."

"I think it’d be very hard to ‘tell all’ when you don’t know me," Markle claimed to the media mogul. "This is a very different situation than my dad – when you talk about betrayal, betrayal comes from someone that you have a relationship with, right? I don’t feel comfortable talking about people that I really don’t know."

"The last time I saw [Samantha] was 19 years ago, and before that, 10 years," Markle shared. "She changed her last name back to Markle I think… only when I started dating Harry. So I think that says enough."

Markle, who was pregnant at the time with her daughter Lilibet, said that she "grew up as an only child" and wished she "had siblings."

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Prince Harry and Meghan Markle attend Queen Elizabeth II's Platinum Jubilee

The Duke and Duchess of Sussex are seen here leaving the National Service of Thanksgiving at St Paul's Cathedral on June 03, 2022, in London, England. The couple resides in California with their son Archie and daughter Lilibet. (Photo by Chris J Ratcliffe)

"That’s why I’m so excited to be pregnant — so that [my son] Archie has someone," she noted.

In early 2020, the Duke and Duchess of Sussex announced that they were quitting royal duties and moving to North America, citing what they said were the unbearable intrusions and racist attitudes of the British media. They now reside in Montecito, California, with their two young children.

Fox News Digital's Melissa Roberto and Madeline Coggins contributed to this report.