Hollywood Home Wreckers
Abbie Cornish and Ryan Phillippe
The Australian actress met Reese Witherspoon's husband on the set of their movie Stop-Loss. They reportedly started a romantic relationship, and the infidelity rumors helped end his seven-year marriage to the Legally Blonde star in 2006. "I had difficulties ... in my marriage long before I met her," said Phillippe, who added that he and Cornish were just "close friends" before they appeared together publicly a year later.