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 … Ben Stiller, Jack Black, Robert Downey Jr., Tom Cruise, Nick Nolte, Jay Baruchel, Brandon T. Jackson Added on Amazon Prime 2022-02-08. Youtube Trailer