Kirsten Stewart has been having sleepless nights over what her ‘Twilight’ co-star and rumoured boyfriend Robert Pattinson has been getting up to in New York.

An insider told ‘Star’ magazine: “Kristen’s been calling him non-stop since he’s been in New York and gets uneasy when he doesn’t answer.”

The 19-year old actress is reported to be worried that Pattinson might fall for his new co-star, ‘Lost’ actress Emilie de Ravin, who split up with her husband in May.

What do you think?