The South Korea-born Previn was one of nine children Farrow had adopted at the time she dated Allen. She and Allen adopted two of those children together, and had another biologically.
In 1992, with their relationship waning, Farrow found nude pictures of Previn, then 22, in Allen's apartment. A furious Farrow called for an investigation of child misconduct, but no criminal charges were brought against the comedian.
Five years later, after celebrating his 62nd birthday, Allen and his 27-year-old girlfriend married. They are now raising two children, in addition to the children Allen has helped to raise with his wife's mother.
"I sold the story of my sex life to Parker Brothers and they're making a game out of it," Woody Allen quipped to reporters in the heat of his marital controversy.
4. Robert Evans and Catherine Oxenberg (32 years)
A giant age gap is at the heart of one of Hollywood's shortest marriages -- a union that lasted just nine days.
In July 1998, famed producer Robert Evans became smitten with 36-year-old actress Catherine Oxenberg, who played Joan Collins' daughter on "Dynasty" and appeared twice as Princess Diana in TV movies.
At the time of their meeting, the 68-year-old Evans had a weak heart and was writing a book about his near-death experience, "I Heard the Fat Lady Sing."
In a little over a week, the marriage was annulled, and neither side would elaborate in detail about the circumstances. "I forgot it had only been six weeks since I had been hit with a stroke," Evans later told the showbiz newspaper Variety.
Evans, now 74, recently produced the Kate Hudson comedy, "How to Lose a Guy in 10 Days," a film that had nothing to do with his time with Oxenberg, though the film title might suggest otherwise.
5. Frank Sinatra and Mia Farrow (29 years)
After two failed marriages and a string of romances with the likes of Lana Turner and Marilyn Monroe, legendary lothario Frank Sinatra tied the knot in 1966 with Mia Farrow. She was 21. He was 50. It ended two years later, after he began an affair with Lee Remick.
In 1970, Farrow married conductor André Previn, and after eight years together, they divorced. By the early 1980s, Farrow began appearing in Woody Allen comedies. And the rest, to Farrow's regret, is history.
6. Humphrey Bogart and Lauren Bacall (25 years)
"Here's looking at you, kid." Humphrey Bogart could have used his immortal "Casablanca" line with Lauren Bacall and meant it literally. Next to him, she really was a kid.
Bogey was six years into his third marriage when he fell in love with Bacall, during the production of 1944's "To Have and Have Not." He was 45 and one of the most powerful men in Hollywood. She was a 20-year-old starlet making her big screen debut.
Just to show you how a celebrity romance, even then, could trump everything else, this film was based on a story by Ernest Hemingway. The screenplay was co-written by William Faulkner. But still, Bacall's part was expanded midway through production because the budding romance was grabbing headlines.
Bogart barely waited for the ink to dry on his divorce papers before sailing away to "Key Largo." On May 21, 1945, 11 days after the court papers came through, he married Bacall. They had two children, and remained together until his death in 1957.
7. Michael Douglas and Catherine Zeta-Jones (25 years)