Chucky's full name, Charles Lee Ray, is derived from the names of notorious killers Charles Manson, Lee Harvey Oswald (assassin of John F. Kennedy) and James Earl Ray (assassin of Martin Luther King).
Catherine Hicks (Karen) and Kevin Yagher (Chucky's creator) met on set and were married a year later.
The film used various ways to portray Chucky, including RC animatronics and little people or child actors. Various animatronics and cosmetics were used for every scene throughout the movie, Chuckie's cosmetics transition from looking toy-like to a more human look. The film created multiple Chucky animatronics such as a flailing tantrum Chucky, a walking Chucky, and a stationary Chucky. The animatronics face was controlled by a remote control through a rig that goes on one's face and captures facial movements.
The original working title for the film was "Batteries Not Included" before it became known Steven Spielberg was also making a film with the same title. It was then changed to "Blood Buddy" before settling on "Child's Play".
In the scene where Chucky runs behind Maggie in the hallway, Chucky was actually played by Alex Vincent's younger sister.
Tom Holland: Voice of the costumed host of the Good Guys program Andy is watching at the beginning as well as Andy's deceased father who is pictured in several photographs around the apartment and mentioned in more detail during a deleted scene.
Tom Holland: the photo of Andy's deceased father in the background in his bedroom is actually a photograph of the director.