Mia Farrow Mia Farrow

In a new interview with Vanity FairMia Farrow says it's possible that Frank Sinatra — not Woody Allen — is the biological father of her son Ronan.

"We never really split up," Farrow tells Vanity Fair of her relationship with the iconic singer, to whom she was married from 1966 to 1968. The Sinatra family treats Ronan, 25, as one of their own, with the singer's daughter, Nancy Sinatra Jr., telling VF: "He is a big part of us, and we are blessed to have him in our lives."

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Sinatra, who died in 1998, would have been 78 when Ronan was conceived. A DNA test has never been performed.

After the interview was published online, Ronan, a Rhodes scholar, human rights activist and lawyer who has served in the Obama administration, quipped on Twitter Wednesday: "Listen, we're all *possibly* Frank Sinatra's son."

Elsewhere in the article, Farrow's daughter Dylan, 28, whom she and Allen adopted, reiterates her accusations that Allen sexually abused her when she was 7. She refuses to speak the director's name, though she says Allen has made two attempts to reach out to her, including sending her pictures of the two of them during her senior year in college.

"I'm scared of him, his image," Dylan, who now uses a different name, tells Vanity Fair. "There's a lot I don't remember, but what happened in the attic I remember. ... The things making me uncomfortable were making me think I was a bad kid."

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Farrow's son Fletcher says he's digitally removed Allen from their family photographs. "We can look at them and be reminded of the good and not be reminded of the bad," he tells Vanity Fair. "I really do think he's got some blood on his hands."

Allen and Farrow were together from 1980 until 1992, but never married. Allen later married Farrow's daughter Soon-Yi, whom Farrow adopted in 1978 with her then-husband Andre Previn. Previn tells Vanity Fair that Soon-Yi "does not exist" to him.