The film made more than $35 million on it's first day.
Stephenie Meyer had her own personal cast before all the roles were officially casted. They included: Emily Browning as Bella Swan, Henry Cavill as Edward Cullen, Charlie Hunnam as Carlisle Cullen, Mary-Louise Parker as Esme Cullen, Rachael Leigh Cook as Alice Cullen, Trent Ford as Jasper Hale, Tom Welling as Emmett Cullen and Olivia Wilde as Rosalie Hale.
Stephenie Meyer, the author of the original books can be seen next to a laptop ordering a vegetarian sandwich in the diner at the beginning of the scene where Charlie asks Bella if she likes the boys in town.
Stephanie makes another cameo in Breaking Dawn Part 1 at Bella and Edward's wedding.
Over 5,000 actors applied for the role of Edward Cullen.
Stephanie Meyer's first choice for Edward was Henry Cavill.
Robert Pattinson and Jackson Rathbone were among the 4 finalists for the role of Edward. Rathbone was eventually offered the other role of Jasper instead. As soon as Robert Pattinson was cast, he moved to Oregon and began working on his character, both physically and mentally. He worked out five hours a day with a trainer: learning to fight, to play baseball, and to do stunts. He also had to learn to drive and get an Oregon driver's license. He didn't talk to anyone so he could feel as isolated as Edward Cullen.
When Edward enters the cafeteria, Robert Pattinson's sister, Lizzy Pattinson, can be heard singing vocals on the soundtrack. Robert Pattinson actually plays the piano in the scene where Edward is playing "Bella's Lullaby".
Nikki Reed was the one who got the producers to add Robert Pattinson's songs to the film. Reed secretly started recording him from her laptop, while he was singing, and playing his guitar. She then took it to the film producers, were they fell in love with his songs. The next day, they asked Rob if he could sing a few of his songs for the soundtrack, and he accepted.
Kristen Stewart has naturally green eyes. She wears brown contacts for her portrayal of Bella Swan.
Kristen Stewart wore hair pieces so they didn't have to waste time doing her hair, and therefore had more time to shoot.
Kristen had a stunt double for some of the film scenes.
Kristen's stunt double, Katie Powers, also plays a waitress at the diner.
Kristen turned 18 while she was filming the Twilight movie.
Taylor Lautner wore a wig for his role as Jacob Black in Twilight and beginning scenes in New Moon.
Nikki Reed (Rosalie Hale) and Jackson Rathbone (Jasper Hale) learned how to play baseball left-handed for the famous baseball scene.
It took 36 hours to turn Nikki Reed's naturally brunette hair to blonde.
Cam Gigandet was originally cast as Emmett Cullen, but asked director Catherine Hardwicke if he could play the role of James instead. She agreed.
Bryce Dallas Howard was offered the role of Victoria but turned it down as she found the role too small. She later took the role when Summit Entertainment fired Rachelle Lefevre from The Twilight Saga: Eclipse.
When Bella and Edward are lying in the meadow, the sun coming through the trees makes a heart between them.
In the scene where Bella goes to the Cullens house for the first time, when Nikki Reed's character had to break the bowl, she actually cut her hands. This is why she is wearing gloves for the scene in the film.
In almost every scene involving a television (including the scene of Bella and Renee in the hospital near the end), the ending ballet studio scene is being played.
While entering the building at the prom, Victoria can be seen at a slot machine to the right of Bella, her hair in a bun, fur, and dress.
In the hospital scene at the end with Edward and Bella there is a drawing of the ballet studio.
When the 'evil vampires' make their first appearance, actors Cam Gigandet, Rachelle Lefevre and Edi Gathegi are all wearing little slippers painted like bare feet.
Jessica in the movie is a combination of the characters Jessica Stanley and Lauren Mallory from the book.
Eric in the movie is a combination of the characters Eric Yorkie and Ben Cheney from the book.