25 year-old British method actress Sienna Miller has managed to keep her mouth shut about her ill-fated on-again off-again relationship with cad Jude Law for at least a month that I can tell. Since splitting with Law, she was linked with Hayden Christensen and super catch P. Diddy. She was partying in Ibiza with Diddy just last week, although she insists they’re “just friends.”

Yesterday she was linked with an upcoming costar, LOTR hottie and fellow Brit Sean Bean, 48. Sienna was said to be head over heels for the actor and to have had him over to her place for some, uh, home cookin’:

In fact, she is so into him that she has already spent a romantic evening with him at her west London home, where she treated him to the culinary delight of beef stew.

A source close to Sienna, 25, revealed: “She is completely mesmerised by Bean already. She has told friends that she can’t help feeling transfixed by his green eyes and loves the fact that he is a real macho man.”

Sienna is due to begin filming Oscar Wilde’s A Woman Of No Importance with Bean in September - but she hasn’t wasted any time in getting to know Sheffield-born Bean.

As well as a romantic meal, Sienna is understood to be on the phone nonstop to the 48-year-old actor, who has split with girlfriend Georgina Sutcliffe.

Our source continues: “He is almost twice Sienna’s age but she doesn’t care about that.

“She has dated many men of many different ages, and who have varied circumstances, so the fact he is a bit older isn’t an issue for her, she is hoping to get to know him a lot better.”

[From The Daily Mail]

Today that same source, The Daily Mail, has her with her other costar, Matthew Rhys (not the hot probably gay one, that’s Jonathan Rhys Meyers.) Either Sienna is all over the place or the Daily Mail is trying to make it like she’s sleeping around, not that she needs help in that department. It seems like the only information they have about this supposed relationship are the group dates Sienna went on with Rhys, Keira Knightley and her boyfriend back when they were filming, but that’s old news and they all just looked like they were hanging out:

With encouragement from mutual friend and co-star Keira Knightly, Sienna and the Welsh actor went on a number of dates back in June.

A friend says, “This is the first bloke Sienna has been serious with since she finally split from Jude. These vicious allegations of her being with Sean ‘Diddy’ Combs and splitting up his relationship with Kim Porter are awful.

“But they have actually worked in her and Matthew’s favour a bit. It has taken the heat off their relationship.”

[From The Daily Mail]

I would bet Sienna is actually all up in Sean Bean’s grill and that this other story about her non-romance with Matthew Rhys is just meant to make her look like a slut. Again, she doesn’t need help in that department.

The NY Post points out that she has a history of hooking up with her co-stars: first Jude Law in Alfie, then Hayden Christiansen, now Sean Bean and maybe Matthew Rhys. She’s young, though, and it’s not like she’s breaking up any relationships - or is she?

In the header image Miller is shown at the NY screening of the film Interview on 7/11. Thanks to WENN. Composite image of Sienna and Sean Bean thanks to the Daily Mail. I’m wondering why her dress looks navy blue in the top picture and black in the second.