Vader, "Star Wars'" intergalactic arch-villain, was voiced by James Earl Jones and played by six foot six (1.98 meter) former weightlifter David Prowse, but Anderson stepped in during the key fight scenes.
"David Prowse wasn't very good with a sword and Bob couldn't get him to do the moves," said Anderson's former assistant, Leon Hill. "Fortunately Bob could just don the costume and do it himself."
Anderson later added to his vast body of work by directing fencing scenes in The Princess Bride and The Fellowship of the Ring.
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