Summit Entertainment has released the teaser trailer of the upcoming Chris Gorak film "The Darkest Hour."
An alien invasion-themed sci-fi thriller movie, "The Darkest Hour" stars Emile Hirsch, Olivia Thirlby, Rachael Taylor, Joel Kinnaman, Max Minghella and Greg Kinnear.

The movie tells the story of a group of young people who find themselves stranded in Moscow and trying to survive following a devastating alien attack.

It is set to be released in 2D and 3D on December 23, 2011.

Check out "The Darkest Hour" trailer below: