Rachel Bilson and Hayden Christensen were photographed landing at the Fiumicino Airport in Rome together. The lovers and co-stars are in town to promote their upcoming film, Jumper. Later on in the evening the couple dined at Romana where Hayden looked like he had a blast.  Working with your partner can go one of two ways - you can absolutely LOVE it or absolutely HATE it. Too much time together can be toxic. But that doesn't look seem the case with Rachel and Hayden.Bauer Griffin