In addition to Planes, Trains and Automobiles (only the last vehicle appears to be used here), Due Date also has elements of other Phillips movies. Obviously Road Trip, and then also there are bits of The Hangover, except in this comedy a character has to get back to see his child being born rather than to get married. The part where the car runs off the bridge also reminds me of a scene from Old School. No sign here of Michelle Monaghan, who plays Downey's expectant wife. But that's okay, because given his popularity these days it makes sense to initially sell the movie primarily on Galifianakis, who almost seems to be reprising the same annoying idiot role from The Hangover that he broke out with.
Check out the trailer after the jump and let us know if you're getting to the point where you want to choke Galifianakis out, too.