A creepy Twilight doll was so disturbing that even the cast felt uneasy working with it. Renesmee, the half-vampire, half-human daughter of Bella and Edward in the "Twilight" films was once a creepy animatronic doll before producers decided to go the computerized route.

The creation was so disturbing that the cast would call it "Chuckesmee" after its similarities to the horror movie doll "Chucky." However the doll never made it into the movie. However with the release of the new "Twilight Forever: The Complete Saga" Blu-ray and DVD sets, the cast finally reveals the creepy doll in a bonus clip.

"Chuckesmee is one of the most grotesque animatronic babies ever to not be seen on film," producer Wyck Godfrey says in a clip.

Director  Bill Condon said something along the same lines in an interview with Entertainment Weekly back in August 2012.

"Chuckesmee was a giant misfire on all fronts," Bill Condon said. "Truly, it was one of the most grotesque things I've ever seen. It was a horror show! There was one shot where I call, 'Cut!' and suddenly she turns her head and mechanically stares right into the camera. It was incredibly disturbing."

Actress Nikki Reed was also disturbed by the doll. "I understand the theory behind it, you know, to have this little creature that does all the hand movements and stuff. I want the whole world to forgive me now before this movie comes out, because I'm holding like a 60-pound mechanical doll ... It's really difficult for me."

However moviegoers never got to see the animatronic doll. Instead, it was replaced with a digital F/X baby until it grew up into actress Mackenzie Foy.

"You're trying to create something that's otherworldly with Renesmee in the movie that has to be preternaturally intelligent yet still look like a baby but actually look a little bit more mature than one would be at one-day-old," Wyck said. "So we ended up pulling the thing out on the day and shooting it. The second you're holding it up you realize this is never going to work. No fake thing is ever going to do the trick. If you're Bella, you're looking at it going, 'I don't want that thing. Put it back!'"