Following its world premiere at the New York Film Festival this weekend, 20th Century Fox has released the second trailer for The Secret Life of Walter Mitty. Ben Stiller stars as this timid photo manager who creates his own meticulous fantasy world to escape his humdrum existence. When an important photo negative goes missing, he sets off on a real-life adventure to track it down, while trying to win over his co-worker (Kristen Wiig). Sean Penn, Adam Scott and Shirley MacLaine co-star in this adaptation of James Thurber's novel, in theaters Christmas Day.