The new film, 'Legend,' follows a true story about twin brothers as they navigate the London underworld in the 1960s.
The film, starting Tom Hardy and directed by Brian Helgeland, was cast with Hardy playing both of the starring roles.
Hardy said he and his stunt-double actually struck each other during the filming to make it more realistic. They also used some creative staging and camera work to add the rest.
Find out more about the film here: http://www.legendthemovie.com/