Actor Robert Englund plays nice guy alien Willie in V. Slightly different from his child-murdering nightmare demon alter ego, Freddy Krueger, from The Nightmare On Elm Street series.
The laser effects cost US$1,000 each. The high cost was due to the lengthy post-production work by manually adding optical effects to the film.
Due to the high cost of the laser special effects, it was decided that human resistance fighters would use regular rifles and pistols. This was explained away in the script as due to high security on the alien armories.
On 30 October 1982, Dominique Dunne, who had been signed to play the role of Robin Maxwell, was at her house with co-star David Packer going over lines for the next day's filming, when her boyfriend John Sweeny arrived unexpectedly and throttled Dunne into a coma. Five Days later, on 4 November 1982, Dunne died. Blair Tefkin was cast to replace Dunne as Robin and all of the scenes that had been shot with the late actress were re-filmed. According to the DVD commentary, however, Dunne is still visible from the back in one group scene that occurs as the Visitors arrive on earth.