The TV spots for this movie displays an unusual disclaimer: Britney Spears Does Not Appear In This Movie. This disclaimer was inserted into TV spots because Britney's management was concerned that people might be lead to believe that Britney actually appears in the movie. It is not her in the movie; but a look-alike.
When the floor manager at the beginning of the film shouts "Hey, Tiffany's left arm is loose again" and then the arm grabs his crotch, this is an in-joke as revealed on the DVD commentary for Bride of Chucky (1998). Jennifer Tilly explains that Chucky's left arm kept grabbing her breasts during shoots.
The gender confused child of Chucky and Tiffany is named either Glen or Glenda by his parents. Glen or Glenda (1953) was Edward D. Wood Jr.'s film in which Wood himself portrayed the transvestite known as Glen or Glenda.
As revealed on the DVD's commentary the directors and producer had difficulty agreeing on the look of Glen. The director wanted to give him his own look and style but the producer felt that he should have features similar to Chucky because after all Glen is his son. As a result Glen was given blue eyes, red hair, and freckles like Chucky. Glen's blue eyes and red hair however are a different shade than Chucky's.
At the beginning of the movie when the dolls are in Hollywood the star in the movie that they are filming is Jennifer Tilly, who plays Tiffany the doll. In the car with Chucky and Glenn/Glenda Tiffany starts going on and on about how Jennifer Tilly is so amazing. She is talking about herself.