Alexis Bledel Urges Josh Hartnett To Prep for the Worst in 'Parts Per Billion' Clip (Exclusive!)

Alexis Bledel gives Josh Hartnett some troubling instructions in this brand new clip from their film Parts Per Billion, provided exclusively to JustJared.com.

The film is being released on DVD and Blu-ray today by the studio Millennium Entertainment! Be sure to grab your copy right now!

PHOTOS: Check out the latest pics of Alexis Bledel

Rosario Dawson, Frank Langella, Gena Rowlands, Penn Badgley, and Teresa Palmer also star in the flick about three couples dealing with a reality-shaking event that threatens to tear them apart.