Kenneth Anger (born Kenneth Wilbur Anglemyer; February 3, 1927) is an American underground experimental filmmaker, actor and author. Working exclusively in short films, he has produced almost forty works since 1937, nine of which have been grouped together as the "Magick Lantern Cycle". His films variously merge surrealism with homoeroticism and the occult, and have been described as containing "elements of erotica, documentary, psychodrama, and spectacle". Anger himself has been described as "one of America's first openly gay filmmakers, and certainly the first whose work addressed homosexuality in an undisguised, self-implicating manner", and his "role in rendering gay culture visible within American cinema, commercial or otherwise, is impossible to overestimate", with several being released prior to the legalization of homosexuality in the United States.

For twenty years from the early 1980s, Anger released no new material. In 2000, at the dawn of the new millennium, Anger began screening a new short film, the anti-smoking Don't Smoke That Cigarette, followed a year later by The Man We Want to Hang, which comprised images of Aleister Crowley's paintings that had been exhibited at a temporary exhibition in Bloomsbury, London. In 2004, he began showing Anger Sees Red, a short surrealistic film starring himself, and the same year also began showing another work, Patriotic Penis. He soon followed this with a flurry of other shorts, including Mouse Heaven, which consisted of images of Mickey Mouse memorabilia, Ich Will! and Uniform Attraction, all of which he showed at various public appearances. Anger's most recent project has been the Technicolor Skull with musician Brian Butler, described as a "magick ritual of light and sound in the context of a live performance", in which Anger plays the theremin, and Butler plays the guitar and other electronic instruments, behind a psychedelic backdrop of colors and skulls.  Anger makes an appearance in the 2008 feature documentary by Nik Sheehan about Brion Gysin and the Dreamachine titled FLicKeR. Anger also appears alongside Vincent Gallo in the 2009 short film "Night of Pan" written and directed by Brian Butler. In 2009 his work was featured in a retrospective exhibition at the MoMA PS1 in New York City, and the following year a similar exhibition took place in London.  Anger has finished writing Hollywood Babylon III, but has not yet published it, fearing severe legal repercussions if he did so. Of this he has stated that "The main reason I didn't bring it out was that I had a whole section on Tom Cruise and the Scientologists. I'm not a friend of the Scientologists." Despite withholding legal action against the highly critical 2015 film Going Clear, the Church of Scientology was known on earlier occasions to heavily sue those making accusations against them.

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