In the last year, Kirsten was linked to Josh, Justin Long, Ryan Gosling, Andrew VanWyngarden, and filmmaker Jacob Soboroff.
Hartnett on the other hand has been linked to Rihanna, Helena Christensen, Rumer Willis, Sienna Miller and even got caught up in a sex scandal.
This past Thursday night, our favorite serial daters Kirsten and Josh were spotted looking very cozy at Blue Ribbon Sushi on Sullivan Street.
"They were whispering and smiling at each other," an onlooker told Page Six. "At times it looked like she wanted to grab his hand, but stopped. She was especially smitten with him."
Given their track record, the relationship probably has a shelf life of three months. But maybe they're just each other’s booty calls in between all their failed relationships?