Mia Farrow claims that her son's biological father could "possibly" be Frank Sinatra.
Mia was married to the legendary singer from 1966 to 1968 and in a recent interview with Vanity Fair she admitted Sinatra and herself "never really split up" as he was the love of her life.
The interviewer then asked if Ronan, her son, could be Frank's son and she replied "possibly".
Ronan is certainly treated like a family member of the Sinatra's as Nancy Sinatra, the singer's daughter, told the magazine "He is a big part of us, and we are blessed to have him in our lives".
Ronan is widely believed to be the son of Woody Allen, whom was in relationship with Mia for 12 years but they split up in 1992 for extraordinary circumstances.
The actress discovered Allen was having an affair with her adopted daughter from a previous marriage.
Soon-Yi Previn, who was adopted around 1978 from Vietnam by Farrow and former husband Andre Previn, is now Allen's wife and following their split in 1992 a long custody battle ensued for Ronan and their two other children, in which Farrow accused the director of sexually abusing.
Dylan Farrow is an adopted daughter of Woody and Mia, she also spoke to Vanity Fair, unveiling a tormented history with her father as she says, "I'm scared of him, his image."
She continued, "I have never been asked to testify. If I could talk to the seven-year-old Dylan, I would tell her to be brave, to testify.There's a lot I don't remember, but what happened in the attic I remember. I remember what I was wearing and what I wasn't wearing."
"I was cracking. I had to say something. I was seven. I was doing it because I was scared. I wanted it to stop" Dylan added.
A representative for Woody Allen told The Associated Press, "The article is so fictitious and extravagantly absurd that he is not going to comment."
Meanwhile, the thought of being Frank Sinatra's son only brought out the sense of humour in Ronan as he posted on twitter "Listen, we're all *possibly* Frank Sinatra's son".
The interview is in November's issue of Vanity Fair that is set to hit the newsstands on October 8th 2013.
Mia Farrow claims Ronan could be the son of Frank Sinatra
Woody Allen and Soon Yi-Previn had an affiar durig his relationship with her adpotive mother, Mia