Sienna's sister begs her to stop her wild, boyfriend-stealing ways

Now that everyone has gotten over Jude Law and Sienna Miller’s tempestuous relationship - and the relationship itself has come to an end - Sienna’s been desperate for attention. First she stole Hayden Christensen from his girlfriend of several years and now she’s after yet another woman’s man.

Insiders says Miller has got her eyes on model Jamie Dornan, Keira Knightley’s ex. While Keira’s has moved on to a new love, her Pride & Prejudice co-star, Rupert Friend, the actress still has feelings for Jamie. “Keira still holds a flame for Jamie,� a source told Britain’s Daily Mail. "There is every chance that he and Keira might one day get back together, so she will be spitting feathers that Sienna is trying to get her mitts on him."

Miller and Dornan have met up on a few occasions at the Electric bar in London. One informant told the Mail that Sienna was "flirting outrageously" with Jamie during a recent visit to the bar.

All of this partying and stealing people’s boyfriends has Sienna’s sister, Savannah worried sick. Says Glamour.com, Savannah convinced Sienna to go to Cornwall for some family chill out time. An insider told the site, "Savannah is laidback and not into any trendy London scene. She feels her sister has been caught-up in a whirlwind of media attention ever since she and Jude Law broke-up. [Savannah] wants Sienna to go for long walks, talk everything over and eat lots of hearty meals - and not spend all her time on her mobile to Jude and her actor pals in London."