It's Alive is a 1974 American science fiction horror film written, produced, and directed by Larry Cohen. It stars John P. Ryan and Sharon Farrell as a couple whose infant child turns out to be a vicious mutant. The film's cast also includes James Dixon, William Wellman Jr., Shamus Locke, Andrew Duggan, Guy Stockwell, and Michael Ansara. The baby was designed and created by special effects make-up artist Rick Baker, and the film's score was composed by Bernard Herrmann.

It Lives Again is a 1978 American science fiction horror film written, produced and directed by Larry Cohen. It is the sequel to the 1974 film It's Alive. The film stars Frederic Forrest, Kathleen Lloyd, John P. Ryan, John Marley, Andrew Duggan and Eddie Constantine. The film was released by Warner Bros. on May 10, 1978. This was followed by a 1987 sequel It's Alive III: Island of the Alive.