The 11th Hour is a 2007 documentary film on the state of the natural environment created, produced, co-written and narrated by Leonardo DiCaprio. It was directed by Leila Conners Petersen and Nadia Conners and financed by Adam Lewis and Pierre André Senizergues, and distributed by Warner Independent Pictures.

Its world premiere was at the 2007 60th Annual Cannes Film Festival (May 16–27, 2007) and it was released on August 17, 2007, in the year in which the Fourth Assessment Report of the United Nations global warming panel IPCC was published and about a year after Al Gore's An Inconvenient Truth, another film documentary about global warming.