Adapted from the 1939 short story by James Thurber, 'The Secret Life Of Walter Mitty' is about of a daydreamer (Ben Stiller) who escapes his anonymous life by disappearing into a world of fantasies filled with heroism, romance and action.

When his job along with that of his co-worker (Kristen Wiig) are threatened, Walter takes action in the real world embarking on a global journey that turns into an adventure more extraordinary than anything he could have ever imagined. Watch the trailer below:

The Secret Life Of Walter Mitty stars Ben Stiller, Kristen Wiig, Shirley MacLaine, Adam Scott, Kathryn Hahn, and Sean Penn. Scheduled to open on December 25.