Well, being young and sexy isn’t always a good thing.  Sienna Miller knows a thing or two about that!

No, we’re not talking her losing points in popularity for dating still-married-and-father-of-four Balt Getty.  Cause, quick update, she’s still seeing him.

Sienna, who was to share the lead of Ridley Scott’s Nottingham with Russell Crowe, was fired because she’s too young and too thin, which would emphasize Crowe’s weight and age.

Poor girl’s gonna have to review her 2009 budget.  I guess Getty will have to keep on playing sugardaddy.

Our national homewrecker Sienna Miller has found another man to put her claws in.  Only this time he’s not married; I guess the Balthazar Getty publicity made her consider this important detail when looking for a new man.  Actor Josh Hartnett (30) is the lucky one.

The two were spotted together at the Shoreditch House in London.  A source revealed:

“They definitely looked like a couple – and a good looking one at that! At one point, they were holding hands across the table, but they quickly hid them underneath. They looked really cozy as they dined, gazing into each other’s eyes, smiling and laughing. They continued talking and drinking until very late into the evening – there was definitely a buzz in the air.”

Hmm. It almost sounds serious.  I hope Slevin knows what he’s getting into.  Won’t be long before she moves on to the next taken man.

While at the Hollywood Dominoes: VIP Launch in London, she told Us Weekly:

“I’m single at the moment, and I’m completely happy with that.  It’s nice not to have a relationship that the press constantly want to scrutinize and discuss. I’m cool with being on my own.”

Yeah right! Is this a plan to try and have an undercover relationship with Getty?  Come to think of it, I don’t think she could keep anything undercover.

Perhaps she’s now interested in some other married guy with less baggage?  It’s only a matter of time before Serial Miller gets her claws into her next victim…

According to TMZ.com, Getty is trying to get back with the mother of his four children Rosetta. The couple have been seperated since Getty was seeing kissing a naked Sienna Miller in Italy. TMZ.com reports that Getty has been calling and emailing Rosetta “incessantly”.