First sighting: In March, Rachel Bilson and Hayden Christensen were first caught lunching together. Rach fed her new man off her plate.
Famous exes: Rachel was super-serious with her O.C. costar Adam Brody for years but split with him in December 2006. Hayden has a thing for his costars, having dated Natalie Portman and reportedly Sienna Miller.
Outlook: Rachel and Hayden seem perfectly comfortable in each other's company and, for the most part, they prefer to lay low. We predict many romantic spring evenings for these two.