Charly (marketed and stylized as CHAЯLY) is a 1968 American science fiction drama film directed and produced by Ralph Nelson and written by Stirling Silliphant. It is based on Flowers for Algernon, a science-fiction short story (1958) and subsequent novel (1966) by Daniel Keyes.

The film stars Cliff Robertson as Charly Gordon, an intellectually disabled adult who is selected by two doctors to undergo a surgical procedure that triples his IQ as it had done for a laboratory mouse that underwent the same procedure. The film also stars Claire Bloom, Lilia Skala, Leon Janney, Dick Van Patten and Barney Martin. Robertson had played the same role in a 1961 television adaptation titled "The Two Worlds of Charlie Gordon," an episode of the anthology series The United States Steel Hour.

The film received positive reviews and was a success at the box office and later in home media sales. Robertson won Best Actor at the Academy Awards.