Way back in April of last year, we brought you a couple of casting announcements for the Timur Bekmambetov (Wanted, Nightwatch) produced, Chris Gorak (Minority Report) directed Sci-Fi film, The Darkest Hour. Since that time, we haven’t heard much about the film starring Olivia Thirlby (DREDD) and Emile Hirsh (Speed Racer) that is set in Moscow and follows a group of Americans traveling in the city when an alien invasion occurs.

Now, out of nowhere Summit Entertainment has released the first trailer. Check it out below!

Trailer: The Darkest Hour

The Darkest Hour starring Emile Hirsch, Olivia Thirlby, Rachael Taylor and Joel Kinnaman is slated to hit theaters on December 23rd, 2011.