Before Behind the Green Door opened in 1972, Marilyn Chambers was already a familiar face to American consumers as the model on Ivory Snow soap and detergent packaging. She was photographed holding a baby and was promoted through the wholesome image associated with Procter & Gamble's brand. The Mitchell brothers exploited that contrast in the film's publicity, borrowing Ivory's famous purity language and describing Chambers in press releases as '99 and 44/100% pure.' The marketing connected an explicit hardcore film with one of the most recognizable domestic-product images in the country, making Chambers's casting seem like an advertising-world scandal rather than merely an adult-film release. The publicity was especially potent because audiences recognized her immediately, even if they had never heard of the Mitchell brothers or their San Francisco O'Farrell Theatre.
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