9. Helen Mirren
Helen Mirren is a critically acclaimed, Oscar-winning British actress who has more than proven her professional chops on stage, in television and in a great many films. To imagine the woman who portrayed the Queen of England, herself, performing in adult entertainment seems extremely out of the ordinary, but, believe it or not, Mirren has done her time in a selection of explicit adult films. One of the most noted ones that the star has been featured in was the 1979 period movie, Caligula. Bob Guccione, founder of the adult magazine Penthouse, produced and financed the film and felt it did not feature enough sex for historical accuracy. The film was a portrayal of the third Roman emperor who was very welcoming towards women, men and animals to his bed. Guccione had a number of real sex scenes filmed and put into the final edit. Mirren served as one of the principal female roles, a primary “love” interest to the title character.