Ronan Farrow is speaking out about the possibility that Frank Sinatra may be his biological father.

The 25-year-old son of Mia Farrow reacted via Twitter on Wednesday following a bombshell interview Mia gave to Vanity Fair in which she said Old Blue Eyes is "possibly" Ronan's father. It has long been believed that director Woody Allen fathered Ronan.

"Listen. We're all *possibly* Frank Sinatra's son," Ronan, a former Rhodes Scholar, tweeted.

Mia and Old Blue Eyes were married from 1966 to 1968, but she remained involved with him in the following years -- even during her long-term relationship with Allen, she told Vanity Fair. Sinatra died in 1998.

"We never really split up," she said.

Meanwhile, Ronan and Allen are reported to have a contentious relationship, ever since Allen became involved with Mia's adopted daughter, Soon-Yi Previn.

In 2012, Ronan tweeted to Allen: "Happy father's day. Or as they call it in my family, happy brother-in-law's day."

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