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 "Leonardo DiCaprio"): He gained public recognition with leading roles in "The Basketball Diaries" (1995) and the romantic drama "Romeo + Juliet" (1996), before achieving international fame with James Cameron's epic romance "Titanic" (1997), which became the highest-grossing film of all time until Cameron's science fiction film "Avatar" (2009) overtook it.
Relevant evidence: No