• Meghan Markle's half-sister Samantha sued her for defamation for allegedly lying in her interview with Oprah Winfrey
  • Samantha strongly disagreed with the Duchess of Sussex's claim that she grew up in "virtual poverty"
  • Samantha also contradicted Markle's claim that she worked to pay her college tuition because their dad paid it for her

Meghan Markle faces another legal battle, this time with her half-sister, Samantha Markle, for allegedly lying in a previous interview.

TMZ obtained the court documents filed by Samantha, 57, on Thursday, claiming that the Duchess of Sussex lied about her and their family during her sit-down interview with Oprah Winfrey for a CBS tell-all last year. The "Diary of Princess Pushy's Sister" author sued Meghan for "defamation," accusing Prince Harry's wife of making up stories that she grew up in "virtual poverty."

Samantha insisted that their father, Thomas Markle Sr., paid for the former "Suits" star so she could attend "elite and expensive private schools." She added that their dad covered Markle's tuition at Northwestern University, in contrast to her claim that she worked to pay her way through college.

She also claimed that Markle lied during their tell-all about the most recent time they saw each other and when she changed her last name back to Markle.

In the interview, Markle alleged that she had not seen her half-sister for "at least 18, 19 years." The Duchess of Sussex also claimed that Samantha "changed her last name back to Markle in her early 50s … only when I started dating Harry," before adding, "So, I think that says enough."

Furthermore, Samantha accused her royal sibling of lying about her and their father, so they "could not interfere with or contract the false narrative and fairytale life story [she] concocted." She also accused Markle of negatively affecting her autobiography and preventing her from getting jobs which caused her emotional and mental distress.

Samantha disagreed with Markle's statement claiming, "I grew up as an only child." The "Horrible Bosses" star said she wished she had siblings and would have loved it. Markle also addressed Samantha's book, saying that it "would be very hard to 'tell all' when you don't know me."

Samantha fired back at Markle's statement in an interview with Inside Edition at the time, saying "the truth was totally ignored and omitted" in the CBS special.

"I don't know how she can say, 'I don't know her,' and she was an only child," she added. "We've got photographs over a lifespan of us together. So how can she not know me?"

The Duchess of Sussex's lawyer, Michael Kump, responded to Samantha's allegations. In a statement released to TMZ, he called her lawsuit "baseless and absurd."

"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.

Meghan Markle won a ruling in February that Associated Newspapers had breached her privacy
Meghan Markle won a ruling in February that Associated Newspapers had breached her privacy POOL via AFP / Jeremy Selwyn