Hayden Panettiere & Milo Ventimiglia Make Out On Set

After jetting off to London for the Glamour Awards this week, Hayden Panettiere is back in the States.

The actress was photographed on the set of Heroes, going back to her trailer after shooting some scenes for the third season of the show. Hayden and boyfriend/costar Milo Ventimiglia were seen kissing and cuddling before going into Hayden's trailer.

Heroes season three has its NBC premiere on September 22nd.