In Tenacious D, Jack Black exudes enough confidence for an entire nation. That notion is turned on it's head in The D Train, which finds the often boisterous comedian taking on the more reserved role of a former high school loser who never made it with the ladies. We have the first trailer and poster for this Sundance hit. The comedy also stars James Marsden, Kathryn Hahn and Jeffrey Tambor.

All his life, Dan Landsman (Jack Black) has never been the cool guy. That's about to change - if he can convince Oliver Lawless (James Marsden), the most popular guy from his high school who's now the face of a national Banana Boat ad campaign, to show up with him to their class reunion. A man on a mission, Dan travels from Pittsburgh to LA and spins a web of lies to recruit Lawless. But he gets more than he bargains for as the unpredictable Lawless proceeds to take over his home, career, and entire life.

Showcasing Jack Black and James Marsden's most intoxicating performances to date, The D Train serves up the question: How far would you go to be popular? Check out the first footage before the film hits U.S. theaters on May 8th. We also have the first poster, which features both leading men. Maybe it'll help you get in the right frame of mind for your own high school reunion this summer!