Sound the trumpets! Ring the alarms! Sienna Miller tells US Weekly that the illicit extramarital affair that she has been having with the very-married Balthazar Getty for the past half-year or so is finally over. Talking to the mag at the Hollywood Dominoes: VIP Launch in London, England this weekend, Sienna confessed her singlehood … before she got snapped creepin’ out of the Automat club in the Mayfair District with a new guy later on that night. It looks like Sienazar are dunzo, y’all!

Sienna Miller and Balthazar Getty have split, the actress tells Usmagazine.com. “I’m single at the moment, and I’m completely happy with that,” she said Friday at the Hollywood Dominoes: VIP Launch in London. “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.” Miller and Getty’s romance first made headlines in July when Getty, 33 — who was married at the time — was photographed kissing a topless Miller, 26, on a boat in Italy. (Miller later sued two British newspapers and a photo agency for breach of privacy for publishing the steamy shots.) On July 21, the Brothers & Sisters star announced that he and wife Rosetta (with whom he has four children) were separated. “In light of the fact that many pictures have surfaced in print and on the Internet which has caused myself and my family great embarrassment, I felt it necessary to at least acknowledge publicly that yes indeed my wife and I have separated and I will not be commenting any further,” he said. In August, Miller’s home in North London was vandalized with the word “slut.”
As you may recall, Sienazar were snapped sucking face on the streets of NYC about 2 weeks ago … mebbe that rendezvous was their last hurrah. BUT, we can’t be sad for Sienna … no sir … for it looks like she has already moved on to greener (well, newer) pastures. Later on in the night, after telling US Weekly that she was single I understand that she was spied chatting up Josh Hartnett (and must’ve struck out?) and was seen leaving the club with some unknown dude who was sucking on a lollipop:

Don’t cry for her, Argentina … something tells me that Sienna Miller will be just fine.
[Photo credit: Splash News]