Director Michael Gottlieb got the idea for this film when he was walking by a store window and was startled to "see" a mannequin move by itself. He realized it was just an optical illusion caused by a combination of lights and shadows, but began to wonder what would happen if a mannequin actually DID come to life.
Originally, the lead part was written to be an older, lonely storekeeper, with Dudley Moore in mind for the role, but when Andrew McCarthy came on board, the part was rewritten to be the part of a young artist.
Kim Cattrall who plays Emmy the mannequin, has a mole below the left side of her mouth. Anne Francis (I) who plays Marsha the Mannequin in Twilight Zone: The After Hours (1960), has a mole below the right side of her mouth.
Journey into the unknown a British TV series aired in 1968 featured a story about a young man called Albert (Dennis waterman) who sees in the display window of a department store an attractive dummy. It comes to life, and smiles at him, he falls in love and so gets a job at the store as a dresser.