In an interview with Terry Gross on her radio program “Fresh Air”, Tim Curry said that he got to meet Prince Charles and Princess Diana because she loved Curry in The Rocky Horror Picture Show (1975) and she requested the meeting while he was in a production of “Love for Love” that they attended. Curry recalled that he was placed at the end of the receiving line, and while Prince Charles only vaguely recognized Curry from seeing him “on television,” Princess Diana told Curry, with a “wicked smile,” that Rocky Horror had “quite completed my education.”
Curry told Gross that in the original play, he started out playing Dr. Frank-N-Furter with a German accent, but he changed that when he heard a woman on a bus speaking in a highly exaggerated High-English accent that reminded Curry of Queen Elizabeth II. He later combined that with elements of his mother’s “telephone voice” to create Frank-N-Furter’s speaking voice. He also said that his mother, “a pretty hip lady,” enjoyed the show, although not as much as she had liked it when he appeared in The Pirates of Penzance (because Queen Elizabeth the Queen Mother had come to that).
Rocky Horror was originally intended to be shown in black and white until the end of ‘Sweet Transvestite’, when it would go immediately to color. 20th Century Fox included a similar cut as an Easter Egg on the 25th Anniversary DVD of the film, but it was slightly different from what was specified in the original screenplay. It was black and white up until Riff Raff opens the door revealing the Transylvanians, at which point it cut immediately to the color film (much like when Dorothy opens her farmhouse door to reveal Munchkinland in The Wizard of Oz) – IMDB