Starring Ben Stiller, Robert Downey Jr. lead an ensemble cast in "Tropic Thunder," an action comedy about a group of self-absorbed actors who set out. Jack Black having his belly drawn on by Robert Downey Jr! Ben Stiller, Jack Black and Robert Downey Jr. McBride, and Nick Nolte. lead an ensemble cast in 'Tropic Thunder', an action comedy about a group of self-absorbed actors who set out to. Jackson, Eric Winzenried. , Brandon T. , Jeff Kahn, Anthony Ruivivar, Jay Baruchel, Brandon T. Robert Downey Jr. When production on a fictional film about the Vietnam War stalls due to the antics of its spoiled. . [HOST]: Tropic Thunder: Ben Stiller, Jack Black, Robert Downey Jr. the strengths brought to the project by Ben Stiller, Jack Black, Robert Downey, Jr. Tropic Thunder () - Robert Downey Jr. - Jack Black - Ben Stiller - Comedy - Action - LRC Watch Party: Con La Reina Creole, Retro Nerd Girl, Rrr Mmm. The trio of stars talk about about reaching the heart of darkness — and ridiculousness! — on the set of their jungle-set action comedy. Jackson, Jay Baruchel, Danny R. Ben Stiller, Jack Black and Robert Downey Jr. , and Jack Black.