This is interesting.  I always assumed that David Prowse was the only person that played Darth Vader in the various Star Wars films and sequels, though seems that someone else played Vader during the lightsabre duels.

That person is Bob Anderson, a Hollywood fencing coach who also worked on Peter Jackson’s Lord of the Rings films, among many others.

After a very illustrious career, he passed on at the age of 89 today.

Thanks to The Los Angeles Times and Hero Complex for the information.