The Temperamentals is a 2009 play by Jon Marans. It chronicles the founding of the Mattachine Society, the first sustained LGBT rights organization in the United States, and the love affair of two of its founding members, Harry Hay (Thomas Jay Ryan) and Rudi Gernreich (Michael Urie). The title is drawn from the early-20th Century usage of the word "temperamental" as slang for "homosexual".