If Jennifer Tilly hadn't accepted the role as Tiffany...
...what other actress could you picture being her?
As Child's Play buffs know, Don Mancini wrote the role of Tiffany specifically with Jennifer Tilly in mind. She accepted the role, much to his surprise as it's unusual in show business to actually get your first choice.
Tilly was obviously perfect for the part. If she hadn't have taken it though, I think Cathy Moriarty (Raging Bull, Soapdish, Casper, Kindergarten Cop) would have given us an awesome and memorable Tiffany as well. She too has a sexy and distinct voice and can pull off psychotic and villainous.