Twilight co-stars Kristen Stewart and Robert Pattinson have been coy when it comes to any possible off-screen romance, but the pair reportedly couldn’t keep their hands off each other after the premiere of the series’ latest film, Eclipse, in Los Angeles. “They were kissing, nuzzling, holding hands and embracing,” a source tells E! News. The pair were spotted hitting a rooftop bar at the film’s after-party.