Leonardo DiCaprio as Dom Cobb, a professional thief who specializes in conning secrets from his victims by infiltrating their dreams.
Ellen Page as Ariadne, a graduate student of architecture who is recruited to construct the various dreamscapes, which are described as mazes.
Joseph Gordon-Levitt as Arthur, Cobb's partner who manages and researches the missions.
Tom Hardy as Eames, a sharp-tongued associate of Cobbs, who uses his imagination to create projections within dreams.
Dileep Rao as Yusuf, an avant-garde pharmacologist, who helps Cobbs do his work unsupervised, unregistered and unapproved .
Ken Watanabe as Mr. Saito, a Japanese businessman who employs Cobb for the team's mission.
The only way to escape is to go deeper