Cast member Kristen Stewart poses at the premiere of "The Twilight Saga: Breaking Dawn - Part 1" at Nokia Theatre in Los Angeles November 14, 2011. The movie opens in the U.S. on Friday.[Photo/Agencies]

Many brides keep their wedding dresses a secret until the moment they walk down the aisle, but all of cyberspace isn't usually speculating about it. The exception is Bella Swan.

The much anticipated bridal gown will make its debut on Friday as "The Twilight Saga: Breaking Dawn, Part 1" is released in movie theaters.

What's known about the gown worn by Kristen Stewart's character as she married Robert Pattinson's Edward Cullen: It's designed by Carolina Herrera. It has 100 buttons down the back. It's made of lace and satin, and it aims to be simultaneously romantic and mysterious.

"Well, the inspiration became a little bit by the book," said Herrera on the red carpet at the Los Angeles premiere Monday night. "And the description of the book, and the magic and the moment that is the wedding and also about her (Bella's) personality which is very important in a wedding gown. She is this very innocent girl that is believing in her first true love and there is romance and there is fantasy and mystery. Everything so, I took all that into consideration."

Pattinson approved, saying it was a "beautiful" dress and Stewart did it justice. "She looked incredible," he said. "I mean, it's a really sweet scene."