A new international trailer for Tropic Thunder has been added to the UK site - check it out above. Tropic Thunder, starring Ben Stiller, Jack Black, Robert Downey Jr., Nick Nolte, Brandon Jackson, Steve Coogan, Danny McBride, Bill Hader and Jay Baruchel opens August 15.

This Tropic Thunder “viral video” had to have been the funniest short of the night — check out Robert Downey Jr. (in Iron Man mask) take on Jack Black (with Kung Fu Panda mask) as Ben Stiller directs and his nephew Carl calls the shots.

Check out this “Tropic Thunder” movie trailer, starring Ben Stiller, a barely recognizable Robert Downey Jr. and Jack Black. Video clip above.