Bob Anderson (September 15, 1922 – January 1, 2012), born Robert James Gilbert Anderson, was the swordsmaster who played Darth Vader in his various fight scenes in The Empire Strikes Back and Return of the Jedi. He replaced David Prowse due to the actor's tendency to break lightsabers. Because of the height differences—Anderson was 6'1", while Prowse was 6'7"—Anderson scenes were filmed from a lower point to make him seem taller or he stood on some small stilts.