If what I heard is correct, she has a stable marriage and three kids. Highly unusual for the Hollyweird crowd. Good on her.
Scandalous Celeb on-set relationships including Brad Pitt and Angelina Jolie
Julia Roberts & Danny Moder: Julia Roberts famously broke up the marriage of Danny Moder and his then-pregnant wife while embarking on an affair on the set of The Mexican. She was in a relationship with Benjamin Bratt, but although she denied any wrongdoing at first, the extra-marital affair was later confirmed by Vera Staimberg (the now ex-wife). Moder then left Staimberg a little over a year later and Roberts convinced the public that her relationship with the cameraman wasnt just a one-off fling. Looks like she was right, as the couple have been married since 2004 and have three children together, making it Roberts longest relationship.
But she tried to humiliate and force out his first wife with nasty tactics. Diva.