Hollywood Babylon is a book by avant-garde filmmaker Kenneth Anger, which details the purported scandals of famous Hollywood denizens from the 1900s to the 1950s. The book was banned shortly after it was first published in the U.S. in 1965, and remained unavailable until reprinted ten years later. Upon its second release in 1975, The New York Times said of it, "If a book such as this can be said to have charm, it lies in the fact that here is a book without one single redeeming merit." The Daily Beast described Anger's book as "essentially a work of fiction. There is no doubt that many—if not all—of the stories Anger shares in his slim bible have no merit." Film historian Kevin Brownlow repeatedly criticized the book, citing Anger as saying his research method was "mental telepathy, mostly".

Kenneth Anger was an American underground experimental filmmaker, actor, and writer. Working exclusively in short films, he produced almost 40 works beginning in 1937, nine of which have been grouped together as the "Magick Lantern Cycle". Anger's films variously merge surrealism with homoeroticism and the occult, and have been described as containing "elements of erotica, documentary, psychodrama, and spectacle". He has been called "one of America's first openly gay filmmakers", with several films released before homosexuality was legalized in the U.S. Anger also explored occult themes in many of his films; he was fascinated by the English occultist Aleister Crowley and an adherent of Thelema, the religion Crowley founded.