Tropic Thunder comes out on August 13.

What do critics have to say about this Ben Stiller-directed comedy? We asked a few for their opinion...

- A smart-alecky sendup of Hollywood in general and action films in particular, Tropic Thunder undeniably provokes quite a few laughs, but of the most hollow kind... -- Variety

- The self-aggrandizing humor becomes tiresome midway through...but the ending is spectacular and relentless. It would be hard for even the most cynical to avoid a hefty chuckle or two by the time the credits roll... -- ReelzChannel

- A broad action comedy that manages to mix subtlety with satire... -- Hollywood Reporter

- Robert Downey, Jr.'s performance is nearly on par with what Heath Ledger did as the Joker... -- Cinema Blend