Justin Bartha, Heather Graham Join "The Hangover"

Justin Bartha knows how to rock the buddy-flicks, doesn’t he? Now he has another one in the works.

He and Heather Graham have joined the cast of Warner Bros./Legendary Pictures’ The Hangover, directed by Todd Phillips. The movie begins this week in Las Vegas.

The story revolves around three buddies, played by Bradley Cooper, Ed Helms and Zach Galifianakis, who lose their best friend (Bartha) at his Caesars Palace bachelor party just 40 hours before he’s supposed to walk down the aisle. The trio try to retrace their steps from the night before and figure out where things went wrong.

More after the jump…

Graham plays a Vegas local who crosses paths with the guys and might know more about the groom than she lets on. Let’s hope they come up with something original on this storyline that’s been done one or two times before.

My favorite Justin Bartha movies: National Treasure and National Treasure: Book of Secrets.

Image: National Treasure: Book of Secrets, Walt Disney Pictures, 2007