Ralph Nelson was an American film and television director, producer, writer, and actor. He was best known for directing Lilies of the Field (1963), Father Goose (1964), and Charly (1968), films which won Academy Awards.

Charly 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.