Woody Allen's son Ronan Farrow disses dad via Twitter

Neither Mia Farrow nor her children have gone on the record too often about the 1992 marriage between "To Rome with Love" director Woody Allen and his then-stepdaughter Soon-Yi Previn. Now one of his sons -- 24-year-old Ronan Farrow -- is speaking out, or tweeting out.

"Happy father's day-or as they call it in my family, happy brother-in-law's day," tweeted Ronan on Sunday (June 17). According to The Daily Beast, Rowan stopped speaking to his dad shortly after his relationship with Soon-Yi became public record.

The message was quickly re-tweeted by mom Farrow, who added the comment "BOOM."

Allen began dating Farrow in 1980 when Soon-Yi -- the adopted daughter of Farrow and second husband Andre Previn -- was just 10 years old.