Is Sienna Miller to Blame for Ending Sean Penn's Marriage?

Is Sienna Miller to blame for the recent Sean Penn and Robin Wright Penn split? Rush & Molloy of the Daily News think that Sienna and her trouble making ways may have struck again. They have reason to believe that Sienna and Sean were seen partying together in NY right before he and Robin broke up.

A random source told the paper, "Sienna was sitting on Sean's lap. She was dressed very sexily. She had her arm around his neck and they stayed up quite late." Unfortunately, this wouldn't be the first time that she's somehow to blame for the demise of a Hollywood couple.

Remember when Sean Diddy Combs and Kim Porter ended their longtime romance? The tabloids were quick to point the finger at Sienna for coming between them. In case anyone is keeping score, this could put Sienna in the lead against both Denise Richards and even Angelina Jolie for the much coveted title of "Homewrecker of the Year".

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