Twilight stars, Kristen Stewart and Robert Pattinson, have reportedly been ordered to keep their romance a secret.

OK magazine claims that the pair are in love, but New Moon producers don’t want their story jeopardizing the launch of the movie this November.

A source said: “The producers took Rob and Kris aside and told them to keep their relationship under wraps for a few more months. But they’re so much in love, they can’t keep their hands off each other.”

An Eclipse insider added: “They’re crazy about each other and want to shout it from the rooftops. But they’re also part of this massive machine called Twilight and producers have this thing timed with scientific precision.

“They don’t want Rob and Kristen to tell the world about their relationship until the time is right.”

However sources also suggest that Robert will only take so much and may just announce the relationship to the world at some point.

“He generally does what he’s told by producers,” they explained. “But this kid has a strong will of his own, and if he wants to walk around Vancouver with Kirsten in front of the world, he’s going to.”