It would be hard to find anyone as unpopular as SIENNA MILLER at the moment. Having moved so swiftly on from her broken engagement to Rhys Ifans to date married father-of-four Balthazar Getty - leaving her Edge Of Love co-star (and ex-boyfriend) MATTHEW RHYS feeling "betrayed" along the way - the actress is fast burning her bridges both in the UK and Stateside.

And her new love, Balthazar, once Tinseltown royalty, has found himself in an uncomfortable position on the set of his TV show, Brothers & Sisters, as co-stars side with Matthew Rhys over the whole situation.

Ahlan! reveals the enemies the pair have made...

Revenge-seeker
Kate Moss
Making good on her promise to give Sisi "an enemy for life" after she hurt Kate's pal, Rhys Ifans, the super is said to be "beside herself" with rage over the public dumping.

Primrose pack
The Primrose Hill Set
Kate's crew, including DAVINIA TAYLOR and SADIE FROST have vowed to cut Sienna dead. "Sienna is persona non grata with the Primrose Hill set," spilled a source. "The likes of Kate and Davinia are all out to get her for hurting Rhys."

Betrayed
Rosetta Getty
A friend of Sienna claims his marriage was over for a year - which hardly explains ROSETTA and Balt's eight-month-old child! - but sources say Balthazar's wife of eight years, is "humiliated".

"Rosetta left the country to protect the kids, and he continues to see Sienna," slammed an insider.

The decoy
Matthew Rhys
Sienna's Edge Of Love co-star and Balthazar's Brothers & Sisters co-star has been left feeling "betrayed" by Sienna, with pals claiming the actress used him to deflect media attention away from her relationship with a married man.

Older and wiser
Sally Field
The veteran actress has taken sides on the Brothers & Sisters set, eschewing Balthazar in favour of comforting Matthew. "It's an edgy situation on set," said an insider. "Matt has been consoled by other stars, including SALLY FIELD, who's been like a rock."