Director Todd Phillips re-teams with his break-out Hangover star Zach Galifianakis for this road movie concerning a soon-to-be father (played by Robert Downey Jr.) and his cross-country trip to make it back in time for his baby's birth -- with the only roadblock being the dubious passenger (Galifianakis) who's along for the ride. Michelle Monaghan and Jamie Foxx co-star in the Warner Bros./Legendary Pictures production.