Roman Polanski got a little help from an old friend in his libel trial against Vanity Fair.

Mia Farrow, who starred in the Oscar-winning filmmaker's 1968 horror classic, Rosemary's Baby, took the stand Tuesday, telling a London court that, contrary to a report in the magazine, in no way did Polanski try to seduce another woman on the way to the funeral of his murdered wife, Sharon Tate.

Per a July 2002 piece in Vanity Fair, Polanski, who had been working in London, made a brief stopover in New York on his way back to Los Angeles for Tate's burial.

While there, the magazine reported he went to Elaine's restaurant and made sexual advances toward a "Swedish beauty." "I will make another Sharon Tate of you," the article quoted him as telling the woman just days after Tate, eight-months pregnant with his child, and four of her friends, were murdered in Polanski's Hollywood home by the Manson family.

According to Farrow, however, the salacious story is bunk. She testified that she met Polanski at Elaine's two weeks after his wife's death and recalled that all the distraught director could talk about was Tate's slaying.

"He started telling me about events in California, what he had gone through, and he got very, very upset," the soft-spoken actress told London's High Court. "We had ordered our dinner, but we just left the restaurant. He was that upset, and I, too."

Farrow said that shortly after exiting the eatery, as they walked the streets of Manhattan, an exasperated Polanski lamented, "Why? Who could've done this?"

He then revealed to her some of the grisly details of the murder scene he encountered upon his return to the house, including "a little kitten that Sharon had and the kitten was still there in the blood."

The 60-year-old Farrow also disputed Vanity Fair's claims that Polanski was an inveterate womanizer, even in the wake of his wife's slaying.

"We were waiting for a table and I remember there were two women who seemed to be trying to flirt with him," Farrow said "I remember because I remember thinking how inappropriate it was and then we sat at our table."

Asked by Polanski's lawyer, John Kelsey-Fry, what his response was, she said: "He paid no attention because we hadn't seen each other since Sharon's murder and that was so huge. I think I might have been crying and was hugging him and he just brushed them off."

Under cross-examination from Vanity Fair's attorney, Thomas Shields, Farrow admitted that some of the details of that night some 35 years ago were murky. But she insisted she got the "central part" right because the evening was too ingrained in her memory given the extraordinary tragedy that had befallen Polanski.

Farrow also rejected Shields' suggestion that maybe she had left Polanski alone at the restaurant, giving him the chance to engage another woman. But she did concede the possibility that Polanski, who was known for being promiscuous, may have had sexual encounters with other women within a month of his wife's funeral.

"I feel there's a big distinction--for men maybe--between relationships and having sex," she said, adding that any such sexual encounters "would in no way detract from his feelings for Sharon."

Also on the stand was Debra Tate, Sharon's sister, who through tears spoke about how Polanski was "an absolute wreck" following Tate's death.

On Monday, Polanski, 71, testified via satellite from his home in Paris that he was in a "state of shock" after reading the magazine's allegations, calling the story an "abominable lie" that "was particularly hurtful, because it dishonors the memory of Sharon."

The Polish-born filmmaker testified via videoconferencing from Paris after an unprecedented ruling by England's highest court permitting him to beam his testimony to Britain to avoid being extradited to the U.S. on a decades-old rape charge.

Shields did get Polanski to admit that sex was therapeutic for him and that he may have had casual sex with someone four weeks after Tate's death.

Aside from Polanski's philandering, Shields also tried to poke holes in the libel case by quoting from the legendary director's own autobiography: "For as far back as I can remember the line between fantasy and reality has been hopelessly blurred."

Arguing that his memory of that time was hazy, the attorney suggested Polanski had an "inability to tell the truth when it matters."