David Prowse, who wore Darth Vader's black armor in the original Star Wars movies, revealed that he is battling prostate cancer but is responding well to radiotherapy treatment for his illness, according to a report in the British Daily Mail newspaper.

The 73-year-old-actor, who appeared as Luke Skywalker's nemesis, has been undergoing radiotherapy for the last couple of months, the newspaper reported. Speaking on a British radio show, Prowse added that he was feeling fine.

Prowse is being treated at the Royal Marsden Hospital in London.

Originally a bodybuilder, Prowse played the Dark Lord in all three original films. Producers decided not to use his West Country English accent for the role, instead giving Lord Vader's lines to deep-voiced American actor James Earl Jones.