Said that of all the directors he worked with while making the original Star Wars trilogy, Irvin Kershner, who directed Star Wars: Episode V - The Empire Strikes Back (1980), was his favorite. David praised Irvin Kershner in an interview for being very helpful and supportive of the actors.
Three clips are available on the Star Wars making of documentary DVD of Prowse speaking Darth Vader's lines.
Trained Christopher Reeve for his role in the first Superman (1978) movie.
Was the Green Cross Code Man, a character used to teach [British] children how to cross the road safely.
When Sebastian Shaw was revealed in Star Wars: Episode VI - Return of the Jedi (1983) as the "man behind Darth Vader's mask", Darth Vader became the first recurring role in a movie series to be played by three actors at the same time: body by Prowse, voice by James Earl Jones and face by Sebastian Shaw.