October Sky is a 1999 American biographical drama film directed by Joe Johnston, and starring Jake Gyllenhaal, Chris Cooper, Chris Owen, and Laura Dern. The screenplay by Lewis Colick, based on the memoir of the same name, tells the true story of Homer H. Hickam Jr., a coal miner's son who was inspired by the launch of Sputnik 1 in 1957 to take up rocketry against his father's wishes and eventually became a NASA engineer.

October Sky is based on the lives of four young men who grew up in Coalwood, West Virginia. Principal photography took place in rural East Tennessee, including Oliver Springs, Harriman and Kingston in Morgan and Roane counties. The film was a moderate box office success and received very positive critical reception; it continues to be celebrated in the regions of its setting and filming.

October Sky is an anagram of Rocket Boys, the title of the 1998 memoir upon which the film is based. It is also used in a period radio broadcast describing Sputnik 1 as it crossed the "October Sky". Homer Hickam said that "Universal Studios marketing people got involved and they just had to change the title because, according to their research, women over thirty would never see a movie titled Rocket Boys." The book was later re-released with the name in order to capitalize on interest in the film.