It is rumored that Lynch created the baby from an embalmed cow fetus. To this day, Lynch refuses to discuss how the baby was really made. The movie took five years to make, as Lynch had difficulty financing it because the finished script was only 22 pages long and most movie studios didn't want to touch it. The movie was financed by friends and family, including actress Sissy Spacek, whom was married to Jack Fisk (The Man in the Planet) at the time.
Most of the actors in the film would only appear in a few films since, if at all. Jack Nance would become a frequent cast member in most of Lynch's films (except The Elephant Man), including a stint on the show Twin Peaks.