Scarlett Johansson and Josh Hartnett Together in Rome. But for How Long?

Looks like Scarlett Johansson and her boyfriend, Josh Hartnett, went out directly after the Rome premiere of Match Point. Either that, or she wore the same dress and coat twice, which, as you know, in Hollywood, is mortal sin. In fact, I think "Thou Shalt Not Wear the Same Outfit Twice" comes right after "Thou Shalt Have an Eating Disorder." Or was it after "Thou Shalt Not Stay Married for More Than Four Years, Tops?"

Johannson and Hartnett recently moved in together, but how long that lasts is anyone's guess, including Scarlett's. According to Contact Music, monogamy is not one her strong suits, and she is quoted as saying:

I don't think human beings are monogamous by nature. It's difficult - you have to put a lot of effort into a relationship. I think it's hard for actors to date each other because they are so damn moody. You are away from people constantly and having a relationship that is strictly by phone, it is miserable.

I give it, three to six months. Either that, or until one of them has a new movie, and Scarlett Johansson's cleavage isn't quite doing the publicity job it should, forcing a last minute publicist-induced break-up.