Hayden Panettiere is a Comic-Con Cutie

Hayden Panettiere and her costar/boyfriend Milo Ventimiglia share a few laughs with each other while promoting their hit NBC show, Heroes, at Comic-Con 2008 on Saturday at the San Diego Conference Center in San Diego, Calif.

Hayden, 18, and Milo, who turned 31 earlier this month, made sure not to stand and/or sit next to each other to avoid additional speculation from their relationship.

Heroes returns with all-new episodes starting with its 2-hour season premiere @ 9PM ET/PT on Monday, Sept. 22.