Kristen Stewart as Bella Swan, a seventeen-year-old girl who moves to the small town of Forks, Washington from Phoenix, Arizona and falls in love with a vampire, Edward Cullen. Her life is put in danger after a sadistic vampire decides to hunt her.
Robert Pattinson as Edward Cullen, a 108-year-old vampire who was changed in 1918 and still appears to be seventeen. He is Bella's love interest and has the ability to read minds, with the exception of Bella's, along with superhuman speed and strength.
Peter Facinelli as Carlisle Cullen, a compassionate 300-plus year old vampire who looks to be in his mid-20s. He serves as the town's physician and is the father figure of the Cullen family.
Ashley Greene as Alice Cullen, a vampire who can see the future based on decisions that people make.
Jackson Rathbone as Jasper Hale, a member of the Cullen family who can manipulate emotions. He is the newest member of the Cullen family, and thus has the most difficulty maintaining their lifestyle of not feeding on humans.
Nikki Reed as Rosalie Hale, a member of the Cullen family who is described as the most beautiful person in the world. She is incredibly hostile toward Bella throughout the entire film.
Cam Gigandet as James, the leader of a group of nomadic vampires which intends to kill Bella. He is Victoria's mate and a gifted tracker, due to his unparalleled senses.