Did Sienna Break Up Sean Penn's Marriage?

January 17, 2008 By:
Did Sienna Break Up Sean Penn's Marriage?

Sienna Miller is being blamed for breaking up Sean Penn and Robin Wright Penn's marriage.  But this doesn't make any sense, because she's dating Rhys Ifans! And she's a good friend of Robin's, so I'm sure Sienna would never do that. But crazier things have happened in Hollywood lately, so I'll keep an open mind. 

The rumors started buzzing after Sienna and Sean partied together in an NYC hotel, and they were "up really late and Sienna was dressed sexily." That's because she's sexy! Come on, this all sounds very high school. Maybe people are confusing Sean Combs with Sean Penn? We'll keep you updated if any reports with some proof surface.