Brad Pitt has labelled the US "war on drugs" a "charade" during a promotional stint for new documentary The House I Live in.

Pitt, who takes a producer's credit on the new film from Why We Fight director Eugene Jarecki, flew in from Europe especially to appear at the Sundance Sunset Cinema in west Hollywood. Jarecki's documentary suggests that efforts by the US government to fight drug trafficking are doomed to failure, and that a new approach should be adopted.