Sienna Miller and Balthazar Getty appear to be very much back on again as they spent the night out in London at the Groucho club last night, albeit leaving separately. Just a few weeks ago Sienna said, "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 scrutinise and discuss. I'm cool with being on my own." But it looks like that's changed again as she stepped out in her hat and fluffy scarf last night, with Balthazar over in the UK for the US holiday Thanksgiving. What do you think about Sienna and Balthazar trying their luck at romance again?