Robert Pattinson and Kristen Stewart are totally doing it

Twilight co-stars Kristen Stewart and Robert Pattinson may have hooked up. They were spotted on a dinner date holding hands at Cecconi’s after the MTV Movie Awards. At around 11 PM, they made their way back to the West Hollywood hotel via police escort (so important!). Meanwhile, Stewart’s boyfriend of four years, Michael Arangano, was nowhere to be found. Pattinson later left the hotel and went to party at Guy’s.

Says an insider of the stars’ budding relationship: “Robert is obsessed with Kristen and has been for a while. He likes that she’s a cool, down-to-earth girl. Kristen never saw Rob as anything but a friend, but that seems to be changing.”

One reason for Stewart’s new interest in her co-star? He’s been bulking up his already enviable bod.

Oh, whatever NYDN. You think girls care about chiseled abs and a sculpted chest more than pleasant conversation and a good sense of humor? No way. My friend is built like a 10-year-old, but has a great personality and he has tons of girls after him. He shows me all of his online chat logs and I can tell he’s really popular with the ladies because they keep wanting to meet at his place. They must think he’s famous and really smart too because they keep asking if he knows this big shot celebrity named Chris Hansen and if they know how to remove an ankle monitor. He’s such a good conversationalist!

Photos are of Kristen Stewart and Robert Pattinson at a restaurant in Italy back in May.