Inception is a 2010 science fiction action film written and directed by Christopher Nolan. The film follows a professional thief, played by Leonardo DiCaprio, who steals information by infiltrating the subconscious of his targets through their dreams. Inception explores complex themes of reality and perception, and DiCaprio's performance as the troubled protagonist, Dom Cobb, is widely praised. The film was a commercial and critical success, earning over $800 million worldwide and receiving multiple Academy Award nominations.