'Tropic Thunder' rolling to San Sebastian

Presented out of competition in official selection

BARCELONA, Spain -- Ben Stiller and Robert Downey Jr. will present the comedy "Tropic Thunder" at the San Sebastian Film Festival in September.

The Stiller-helmed DreamWorks production is set to unspool as part of the official selection in an out of competition slot.

"Thunder," an action comedy about a group of self-absorbed actors out to make the world's most expensive war film, is being distributed here by Paramount Pictures Spain.

The film attracted attention this week when protesters, led by Special Olympics chairman and CEO Timothy Shriver, marched outside the U.S. premiere of the film Monday night.

The festival is set to run Sept. 18-27.