Can't believe no one made a thread on this movie. This movie, i think, is the best this year yet after Dark Knight. The acting by Robert Downey Jr. was pure awesomeness. And also, this move knocked off Dark Knight from the top spot after its 4 week reign. This is THE best comedy movie i have ever seen.
Also starring Ben Stiller, Jack Black, Steve Coogan.
Also i should mention that it sparked some controversy about Downey playing a black man which i think is utterly baseless, just another excuse for hardliners to play on.
Summary
Through a series of freak occurrences, a group of actors shooting a big-budget war movie are forced to become the soldiers they are portraying
(taken from IMDB)
For full info
Tropic Thunder (2008)