It appears that some A-list celebrities have checked into Chicago without alerting the paparazzi. Very sneaky!

But nothing remains a secret in this city for too long.

“Matt Damon, Kate Winslet and Marion Cotillard just checked into the Peninsula. They are in town for a month shooting a film in Wilmette… is what I am being told,” said an ultimate insider to nightlife and dining writer Audarshia Townsend.

The movie titled Contagion is an action-thriller centered on the threat posed by a deadly disease and an international team of doctors contracted by the CDC to deal with the outbreak.

And if you check the Chicago Film Office website, it confirms that the film Contagion starring Matt Damon and Gwyneth Paltrow will begin filming today around the city. The filming is scheduled to continue throughout October and finish on December 17th.

Other veteran actors in the all-star cast include Jude Law and Laurence Fishburne.

The Triangle has now officially been put on RED ALERT for celebrity spotting!

Source: Pop Buzz!