Ben Stiller, Jack Black and Robert Downey Jr. lead an ensemble cast in “Tropic Thunder,’ an action comedy about a group of self-absorbed actors who set out to make the most expensive war film. After ballooning costs force the studio to cancel the movie, the frustrated director refuses to stop shooting, leading his cast into the jungles of Southeast Asia, where they encounter real bad guys. (Source)

Everything goes wrong during the making of a big budget war movie, and the Hollywood actors end up becoming the commandos they are playing. (Source)

Ben Stiller's satirical look at Hollywood, Tropic Thunder concerns the production of an epic Vietnam War film that quickly derails thanks to the giant egos of everyone involved in the production. Stiller stars as Tugg Speedman, an action hero trying to segue out of that genre. Jack Black plays Jeff Portnoy, a drug-addicted fat comic also attempting to change his image by taking on such a serious film. They star alongside Kirk Lazarus (Robert Downey Jr.), one of the world's most awarded actors, and a man who insists on immersing himself totally in a role. In this case, that means Lazarus has had his skin dyed in order to portray an African-American soldier. After their outrageous behavior lands the film's director, Damien Cockburn (Steve Coogan), in very hot water with producer Les Grossman (Tom Cruise), Cockburn takes the advice of grizzled Vietnam vet Four Leaf Tayback (Nick Nolte); in order to gain control of his performers, Cockburn drops the actors off in the jungle, planning to film the movie guerrilla-style with hidden cameras. When the group stumbles upon a heroin production camp, the actors are unaware that they are in very real danger. - Perry Seibert, All Movie Guide (Source)