Sienna MillerSienna MillerSome tongues just won't stay put.

And at the receiving end of the gossip lashings is Sienna Miller.

Yes, the rumblings about her and Balthazar Getty are going on - and on and on.

What's up this time?

Well, according to the Metro, a pal of Si's has defended her to say that, well, Balth's marriage to his wife, Rosetta, has been rocky for a while, even before snaps of Si snogging Balthazar in Italy on a boat emerged.

They quote a source as saying: "Sienna didn't break up his marriage.

"It's been in trouble for a year. The truth is, they've quietly separated."

All we've heard from any of the parties involved is Balthazar denying any romantic attachment to Si, so the truth is still out there... somewhere, but who knows if this is it?