When rumors hit that the young Australian actress, Abbie Cornish, was behind the breakup of the marriage of Ryan Phillippe and Reese Witherspoon, many questioned who this young woman was. She hasn't been in many high profile movies yet, but it's likely her name will now be on the tip of most people's tongues, whether it be as an up-and-coming actress being compared to a young Nicole Kidman, or whether it be as 'the other woman.'