Inception is a 2010 science fiction film directed by Christopher Nolan that explores the concept of shared dreaming and dream manipulation. It stars Leonardo DiCaprio, Joseph Gordon-Levitt, and Ellen Page. The plot involves a skilled thief named Dom Cobb who is hired to perform "inception", which is planting an idea in someone's subconscious. Cobb assembles a team to enter the dreams of a businessman's son to complete this mission, but they must navigate through multiple layers of dreams to succeed.