To listen to the Oscar-nominated actress gush about fiancé Benjamin Millepied and their unborn child, one immediately conjures up images of fairytale meeting on the set of "Black Swan." What Portman doesn't want us to know, is that the hunky ballet dancer and choreographer left his live-in girlfriend of three years, ballerina Isabella Boylston, to pursue the relationship. While music producer Swizz Beatz insisted in 2008 that his "friend" Alicia Keys was not responsible for the breakup of his five-year marriage to R&B singer Mashonda, with whom he had two small children, she penned an open letter to her fellow singer which included the line "We made a vow to God and I believe you should have respected that, as a woman." By 2010, Beatz and his buddy were already married with a child of their own. The notorious runaway bride finally found 'The One' in cameraman Danny Moder when they met on set of 2001's "The Mexican." Unfortunately, his wife-of-four years Vera Steimberg also thought he was 'The One' and was understandably shell-shocked when America's Sweetheart ran off with her husband. As if the situation wasn't ugly enough, Roberts was then photographed wearing a t-shirt with "A Low Vera" splashed across the front when the makeup artist wouldn't grant Moder a quickie divorce. Meg Ryan She's well known for breaking up her own marriage to hubby Dennis Quaid after her affair with "Proof of Life" co-star Russell Crowe but it's the other relationships that she may have helped destroy which have failed to catch wind. Not only did her secret romance with John Cougar Mellencamp reportedly lead to his recent split from wife of 19 years, Elaine Irwin, but Ryan was also rumoured to be the other woman in the breakup of Tim Robbins and Susan Angelina Jolie Despite being the most famous Hollywood home wrecker for stealing Brad Pitt from Jennifer Aniston, Jolie's popularity never seemed to sway and the world welcomed the relationship with open arms from the beginning. Despite initially denying that her and Pitt were anything but friends before his split from Aniston, and long after shooting on "Mr. & Mrs. Smith" wrapped, Jolie let the cat out of the bag in a 2008 interview. "Not a lot of people get to see a movie where their parents fell in love," she said. Tori Spelling The similarities between the "90210" starlet's road to wedded bliss with hubby Dean McDermott are almost identical to that of Leann Rimes and Eddie Cibrian, who also met while married to other people on the set of a made-for-TV movie. In Spelling's case, the situation was made even uglier by the fact that her new love had just adopted a baby girl with his wife of 12 years, Mary Jo Eustace. But by some stroke of luck, Spelling managed to turn her relationship and two subsequent children into reality TV gold while Rimes spends her days cleaning the egg off her house. Jerry Seinfeld He didn't always get the girl on "Seinfeld" but Jerry certainly did in real life. When he first laid eyes on Jessica at the gym, she had just returned from a three-week Italian honeymoon with her Broadway producer hubby Eric Nederlander. But after only four months of marriage, the pretty brunette filed for divorce in Oct. 1998 and a little more than a year later was exchanging vows with the famous comedian. Calista Flockhart Thankfully the former "Ally McBeal" star and her "Indiana Jones" hubby are one of the wealthiest couples in showbiz because Harrison Ford had to dish out a reported $85 million to divorce his screenwriter wife of 20 years, Melissa Mathison. Ford's split reportedly only became official two years after his engagement to Flockhart. Not only did the "Stage Beauty" actress run off with co-star Billy Crudup - who ditched his girlfriend of eight years to be with Danes - but Mary-Louise Parker was also seven months pregnant with his first child at the time. Fast-forward four years later and Danes allegedly had cheated on Crudup with her now-hubby, actor Hugh Dancy. Jennifer Lopez It may be hard to believe that Jenny from the Block would break up a family for a rock - but that's what Marc Anthony's ex-wife and mother of his two children thinks. Miss Universe Dayanara Torres has long insisted it was J.Lo who broke up her marriage to the Latin singer, who went on to say "I do" to Lopez less than a week after his divorce was finalized.