Let the hair-pulling begin! Stella McCartney was reportedly fed up with Heather Mills a long time ago and wasn't afraid to let her famous dad know about it either.
The fashion designer is said to have threatened to kill her step mom during a heated argument with her Beatle father.
Stella, who is currently pregnant with her second child, allegedly made the threat after learning that Heather had claimed Paul had been physically abusive towards Stella's late mother Linda during their marriage.
According to Britain's News of the World newspaper, a hysterical Stella had to be restrained by her father as she screamed, "I'm going to kill that b***h. I can't believe what she's doing to you."
The 34-year-old then reportedly launched into a tirade directed at Heather, fuming at her ex-Beatle father, "I told you she was a b***h. Why did you marry her? She's been a manipulative cow from day one. She won't be happy until she destroys all of us - and our memories of our mother."
The heated argument between Stella and Paul occurred at the McCartney family's Peamarsh home during a meeting which had been arranged to discuss Paul's impending divorce from the 38-year-old former model.
Earlier this month, Heather also accused Paul of being "physically violent" towards her.
Among the most serious allegations made in court papers lodged by Heather's lawyer included accusations that Paul pushed her into a bath while she was pregnant, pushed her over a coffee table and poured wine over her head before allegedly stabbing her in the arm with a broken glass.