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 … Ben Stiller, Jack Black, Robert Downey Jr., Tom Cruise, Nick Nolte, Jay Baruchel, Brandon T. Jackson Added on HBO 2022-06-17. Youtube Trailer