Actress Mia Farrow admitted in her interview with Vanity Fair that her son Ronan Farrow is 'possibly' Frank Sinatra's son.

Farrow was married to the crooner from 1966 to 1968 but her relationship with Sinatra continued sporadically in the early years of being with Woody Allen.

Ronan Farrow, a human rights lawyer, is reportedly not taking the news that seriously. He quipped on social networking site Twitter that "we're all *possibly* Frank Sinatra's son."

"Strangers in the Night" singer Frank Sinatra was a known playboy during his heyday. He married four times and also had a number of notable relationships throughout his life. He has children from some these relationships.

Nancy Sandra Sinatra

The singer and actress is known for her song "These Boots Are Made for Walkin'". She is Frank Sinatra's first child from his first marriage.

Frank Sinatra, Jr.

Perhaps the most notable story about the songwriter and conductor is when he was kidnapped at Harrah's Lake Tahoe in 1963. He was released after his father paid the USD 240,000 ransom.

Because Frank Sinatra, Sr. was only allowed to communicate to the kidnappers via payphone, he got into the habit of carrying a roll of dimes for fear of the line being cut off. He carried a roll of dimes in his pocket for the rest of his life.

Christina Sinatra

The film producer is the youngest of Sinatra's children with first wife Nancy Barbato. When Barbato and Sinatra divorced, Tina was only three years old. In the year 1968, while Frank Sinatra was married to Mia Farrow, Tina recorded an album with her father. The album also features a duet with Nancy Sinatra.

Julie Sinatra

Julie was well into her 50s when she found out that Frank Sinatra is her father. In an interview with the Santa Fe New Mexican, Julie said she was channel surfing when she saw a mini series on TV about Frank Sinatra's life. She said the mini series caught her attention because one starlet featured in the series resembled her mother, Italian Dorothy Bunocelli.

Bunocelli told her daughter about her affair with Frank Sinatra in 2002 before her death.