I is a 2015 Indian romantic science fiction action film directed by S. Shankar, produced and distributed by V. Ravichandran under Aascar Films. The film stars Suresh Gopi, Vikram and Amy Jackson in lead roles, while Santhanam, Upen Patel, Ojas Rajani (in her film debut) and Ramkumar Ganesan portray pivotal roles. The film, told in nonlinear narrative, tells the story of a bodybuilder-turned-supermodel Lingesan alias Lee, who sets out to exact revenge against his enemies after they turn him into a hunchback by injecting him with I virus. The parts of the film were loosely based on The Hunchback of Notre Dame and Beauty and the Beast.

The soundtrack and musical score were composed by A. R. Rahman, while production design was handled by T. Muthuraj. P. C. Sreeram was the film's cinematographer and editing was done by Anthony. The VFX were designed by V. Srinivas Mohan through Rising Sun Pictures. Weta Workshop had worked on the digital and prosthetic make-up and background arts for the film. Principal photography commenced on 15 July 2012. The filming lasted for two years and eight months, during which shooting was done extensively in China. Further schedules were filmed in locations in Chennai, Bangkok, Jodhpur, Kodaikanal, Pollachi, Bangalore and Mysore. The climax train fight scene was shot in the railway stations of Chengalpattu, Rayagada, Brahmapur and Visakhapatnam. The film was dubbed and released in Telugu and Hindi languages, along with the original Tamil version.

I was released on 14 January 2015, coinciding with Pongal festival, and received positive reviews from critics with praise for its direction, acting (especially Suresh Gopi, Vikram and Amy Jackson), cinematography, visual effects, production design, action sequences and music, but criticized its runtime, pace and editing. The film was a commercial success, grossing ₹227—240 crore worldwide, becoming one of the highest grossing Tamil films of all time and Vikram's highest-grossing film until Ponniyin Selvan: I. Vikram won the Filmfare Award for Best Actor – Tamil for the film.