Question: Name the American actor, film producer and environmentalist activist who co-wrote the '11th Hour', a 2007 documentary film about the state of the natural environment, distributed by Warner Independent Pictures?
Sentence (from "The 11th Hour (2007 film)"): The 11th Hour is a 2007 documentary film, created, produced, co-written and narrated by Leonardo DiCaprio, on the state of the natural environment.
Relevant evidence: Yes