Opens July 30 Inception (PG-13) What's It About: Warner Bros. presents the new film by The Dark Knight's Christopher Nolan, this one taking on a sci-fi psychological spin for the serious-minded action auteur, with Leonardo DiCaprio spearheading the cast. Emma Thomas serves as producer, with Joseph Gordon-Levitt, Ken Watanabe, Marion Cotillard, Cillian Murphy, and Ellen Page rounding out the supporting roles.