Behind the Green Door is a 1972 American pornographic film, widely considered one of the genre's "classic" pictures and one of the films that ushered in the Golden Age of Porn (1969–1984). Featuring Marilyn Chambers, who became a mainstream celebrity, it was one of the first hardcore films widely released in the United States and the feature-length directorial debut of the Mitchell brothers.

Marilyn Ann Taylor, known professionally as Marilyn Chambers, was an American pornographic actress, exotic dancer, model, actress, singer and vice-presidential candidate. She was known for her 1972 hardcore film debut, Behind the Green Door, and her 1980 pornographic film Insatiable. She ranked at No. 6 on the list of Top 50 Porn Stars of All Time by AVN, and ranked as one of Playboy's Top 100 Sex Stars of the Century in 1999. Although she was primarily known for her adult film work, she made a successful transition to mainstream projects and has been called "porn's most famous crossover".