While we're sure Zach Galifianakis would be great and in-no-way sociopathic company in real life, his on-screen personas are a thing of terrifying majesty. Whether dosing his buddies with Rohypnol in The Hangover or taking a giant mallet to Hollywood egos on Between Two Ferns, he's currently delivering some uniquely off-the-reservation characters.
Next up is Due Date's wannabe actor Ethan Tremblay who, as the tagline on the comedy's new character posters indicate, is the fly-in-the-ointment for Robert Downey Jr.'s expectant father, Peter. With five days to get back to his wife in time for the birth of their child, Peter is forced to hitch a ride with Tremblay. This being a Todd Phillips movie and all, things do not run smoothly.