Sienna Miller, through her lawyer, has denied all allegations that she is the reason for the break-up between Sean Penn and soon-to-be ex-wife Robin Wright Penn. She has called the published rumors “outrageous,” “false,” and “highly defamatory.” Her lawyer has also said Sienna “will not hesitate to file suit when necessary to protect her rights.” Considering she just successfully sued someone for taking nude photos of her on set, I’d be careful about crossing legal lines with her!