Sienna Miller and the Oil Heir (No, Not Brandon Davis)

Sienna Miller likes to come at a situation from all angles. She's already played the wronged fiancée who was left brokenhearted after her man was caught sticking his Lincoln Log into his children's nanny's Easy Bake Oven. But now Sienna's thinking, "That was no fun. It's probably better to be the other woman. Maybe I should give it a go." Reports The Mirror:

Sienna Miller is in a messy love triangle with a married millionaire a month after dumping actor Rhys Ifans.

The star has fallen for Balthazar Getty, 33, a member of the super rich oil dynasty.

But he is married with four children, including June Catherine, who is just eight months old.

His furious wife Rosetta Getty is speaking to divorce lawyers today.

It is not yet known if Sienna, 26, will be named in any court papers.

A friend of [Balthazar's Brothers & Sisters costar] Matthew [Rhys]'s said: "They began meeting in Prague and that was when the chemistry started and he began wooing her.

"She had a boyfriend and it didn't immediately turn physical but there was something there.

"This behaviour is typical Sienna. She loves the power of being able to take a man off another woman.

"At least Rhys Ifans can try to get over it now. He knows she lied to him about Prague so that will make it a bit easier for him to move on."

For the past month Sienna and Balthazar, said to be "besotted and smitten", have been getting closer.

The tycoon's wife and children Cassius Paul, Grace, Violet and June Catherine, are all thought to have gone to stay in one of the family's well-staffed villas in Italy while a divorce is thrashed out.

A source confirmed: "Sienna got to know Balthazar through Matthew and they hit it off. They have grown incredibly close. He secretly flew to London and Prague to be with her. She has spent last week in a Hollywood house with him."

The pair have been holed up day and night with each other as their romance blossomed.

Sienna flew to Los Angeles last Monday after finishing her nine-month relationship with Ifans.

On Wednesday Sienna ordered a takeaway and took it back to a hideaway house in Hollywood she was sharing with Balthazar.

They ate out in LA on Thursday and met friends including actor Johnny Lee Miller for drinks on Friday, arriving separately.

A witness said: "Getty came in and everyone made space for him to sit by Sienna at the table. They clearly knew they were together."

Before he was married Balthazar was romantically linked with Drew Barrymore and Milla Jovovich.

Yeah, it sucks when some rich dude leaves his wife and kids to shack up with some hot young Hollywood thing, but to us that's not really the point here. The real point is that Balthazar Getty is finally making gossip headlines, just like our thirteen-year-old self imagined he would as we watched Lord of the Flies for the thirty-seventh time. Hopefully this will mean a resurgence in popularity for teen stars of the early '90s. Maybe next week Wil Wheaton will get popped for DUI.


As always, see Sienna's seashells at MrSkin.com.